FORM 6-K

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                        Report of Foreign Private Issuer

                    Pursuant to Rule 13s - 16 or 15d - 16 of
                      the Securities Exchange Act of 1934

                           For the month of March 2006


                                  Acambis plc
                (Translation of registrant's name into English)

                           Peterhouse Technology Park
                               100 Fulbourn Road
                               Cambridge CB1 9PT
                                    England

                    (address of principal executive offices)

    (Indicate by check mark whether the registrant files or will file annual
                 reports under cover of Form 20-F or Form 40-F

                         Forms 20-F X     Form 40-F

  Indicate by check mark whether the registrant by furnishing the information
     contained in this Form also thereby furnishing the information to the
                Commission pursuant to Rule 12g3-2(b) under the
                       Securities Exchange Act of 1934).

                              Yes       No X

 (if "Yes" is marked, indicate below the file number assigned to the registrant
                   in connection with Rule 12g3-2(b): 82- ).




Enclosure:

Final Results


Acambis drives pipeline forward during year of investment

Cambridge, UK and Cambridge, Massachusetts - 9 March 2006 - Acambis plc
("Acambis") (LSE: ACM, NASDAQ: ACAM) announces its results for the year ended 31
December 2005.

Key points

>   Financial highlights
         o   Full-year revenues of GBP40.9m in line with management expectations
         o   Year-end cash position of GBP68.0m
         o   Strong year for sales of Vivotif(R)
>   ACAM2000:
         o   Negotiations ongoing with US Government for warm-base manufacturing
             contract
         o   Rolling submission of Biologics License Application to US FDA
             ongoing
>   MVA3000:
         o   500,000 doses of MVA3000 delivered to US Government, in line with
             ongoing contract requirements
         o   Awaiting response to tender submitted to US Government
         o   Strategy to counter BN MVA IP litigation being outlined today
>   ChimeriVax-JE
         o   Enrolment to both safety and efficacy Phase 3 trials ahead of
             schedule and nearing completion
         o   Phase 2 paediatric trial to start in India in second quarter
>   ChimeriVax-West Nile: first company to enter Phase 2 clinical trials
>   C. difficile: encouraging results from first Phase 1 trial
>   ChimeriVax-Dengue: sanofi pasteur advancing into Phase 2 trials


Key financials*



                                                         Three months ended              Year ended
                                                             31 December                31 December
                                                         2005          2004          2005          2004
Revenue                                               GBP23.9m      GBP23.1m      GBP40.9m      GBP85.5m
                                                                                          
(Loss)/profit before tax                              GBP(5.1)m      GBP4.4m     GBP(27.7)m     GBP27.0m
Basic (loss)/earnings per share                         (5.8)p         4.5p         (24.3)p       18.5p
Basic (loss)/earnings per ADR                           $(0.20)        $0.17        $(0.83)       $0.71
Cash, cash equivalents and liquid investments         GBP68.0m      GBP101.8m     GBP68.0m     GBP101.8m


* Prepared under the Group's accounting policies based on International
Financial Reporting Standards


Gordon Cameron, Chief Executive Officer of Acambis, said:

"Vaccines are once again back on the top of the political and healthcare agenda
through emerging threats such as Clostridium difficile and pandemic influenza.
Increased government and industry investment, combined with improved pricing,
are making vaccines increasingly attractive to both new and incumbent
participants.  With this favourable environment, and our strong pipeline and
manufacturing capabilities, Acambis is well placed to be a key player in our
industry's growth."

A meeting and conference call for analysts will be held today at 9.00 am GMT.
For details, contact Mo Noonan at Financial Dynamics on telephone number +44 (0)
20 7269 7116. An instant replay of the call will be available until 9 April 2006
on telephone number UK: +44 (0) 20 7365 8427 and US: + 1 (617) 801 6888. The pin
code is 38146945. A webcast of the call will also be available via Acambis'
website at www.acambis.com. The webcast replay will be available for 12 months
until 9 March 2007.


Chairman's statement

OVERVIEW

At the beginning of last year, we positioned 2005 as a year of investment aimed
at building both our product portfolio and the infrastructure or capabilities
that we consider to be key to the effective management of our business now and
in the future. In both areas we had a very successful year. Our most notable
achievement was the progression of each of our proprietary programmes into the
next stage of development, including ChimeriVax-JE, which is now undergoing
pivotal Phase 3 trials in Australia and the US. We also expanded the pipeline
with the addition of an exciting influenza vaccine programme by acquiring an
ongoing programme and starting a research collaboration. Our capabilities were
increased through the acquisition of a fill/finish facility in the US, which has
given us the opportunity not only to bring in-house an increasingly scarce
resource but also to complete our manufacturing supply chain.

In addition to building our pipeline and capabilities, we have an ongoing aim to
exploit our competitive strengths in the smallpox arena to gain as much value as
possible from our franchise of products: ACAM2000, MVA3000 and C-VIG. We made
good progress with our existing MVA3000 contract, including delivering 500,000
doses to the US Government, and, in January 2006, started submission of a US
licence application for ACAM2000. During 2006, based on indications from the
Centers for Disease Control and Prevention (CDC), we continue to expect to sign
and initiate a US Government warm-base manufacturing contract for ACAM2000 and
we also look forward to a decision on the US Modified Vaccinia Ankara (MVA)
stockpiling tender, for which we submitted a proposal in October 2005.

As we have previously reported, we are now in a litigation process relating to
MVA as a result of complaints filed against us by Bavarian Nordic (BN) in the US
in August 2005. A further suit was filed in Austria in February 2006. BN alleges
that we have used its trade secrets in the development of our MVA3000 vaccine
and that we are infringing its patents. We strongly believe these allegations
are without foundation and we are vigorously defending our position. Today, we
are outlining elements of our strategy to provide an insight into our view of
the litigation.

Our financial  performance  during 2005 was in line with our  expectations.  The
guidance  we gave at the  beginning  of the year was for  GBP40m of  predictable
revenues and the actual  performance  was GBP40.9m.  The fact that almost 60% of
this revenue was recognised in the fourth quarter of the year  highlights one of
the  principal  challenges  of  predicting  and relying on  biodefence  contract
revenues  and we  continue  to pursue  opportunities  to build  more  mainstream
revenues.  In this area, 2005 was a particularly  good year for sales of Vivotif
as we were able to capitalise on availability  issues for the competitor typhoid
vaccine to improve revenues and market share.

SMALLPOX FRANCHISE UPDATE

ACAM2000: licence application being submitted and warm-base manufacturing
contract negotiations underway

Following a pre-Biologics License Application (BLA) meeting with the FDA in
November 2005, we have started submission of our BLA for ACAM2000. This is the
culmination of over five years of work to provide the US Government with a
next-generation, licensed smallpox vaccine. We are submitting the BLA on a "
rolling" basis under the fast-track status awarded to the programme in December
2004. The submission will include safety, tolerability and immunogenicity data
obtained from clinical trials of ACAM2000 conducted in more than 3,800 subjects.
Given ACAM2000's fast-track status, we expect to receive the FDA's decision on
our application before the end of the year.

We are currently in negotiations with the US Government about a contract for us
to provide warm-base manufacturing for ACAM2000 on a long-term basis. This is
intended to maintain our facilities in a state of production readiness and, if
necessary, to provide the US with ongoing surge capacity in smallpox vaccine
production. In September, we reported that the CDC had indicated to us that it
would be proceeding with a warm-base manufacturing contract during US Government
Fiscal Year 2006, which runs from 1 October 2005 through 30 September 2006. We
are on track to achieve that timeline.

We remain confident that there are further opportunities to sell ACAM2000 to
other governments. Whilst we did not achieve any significant sales during 2005,
discussions with various countries indicate that some are awaiting the outcome
of the US product licence application process before proceeding with their
procurement decisions.

MVA3000: good progress on existing contracts ensures strong competitive position
in bidding for stockpiling contract

During 2005, we made excellent progress on our existing contract with the US
Government agency, the National Institute of Allergy and Infectious Diseases
(NIAID), including delivering 500,000 doses of our MVA vaccine, MVA3000, in
December.

We also initiated a Phase 2 safety and immunogenicity trial, enrolment for which
is now complete, and are currently recruiting for a trial in HIV-infected
subjects.

Together with our co-development partner, Baxter Healthcare SA (Baxter), we
submitted our bid for a US Government stockpiling contract in October 2005. This
was in response to a Request for Proposals (RFP) issued by the Department of
Health and Human Services (HHS). The RFP is for the manufacture of up to 20
million doses of MVA attenuated smallpox vaccine and advanced clinical testing
up to and including obtaining a product licence. It also includes options for
the purchase of up to 60 million additional doses of MVA and warm-base
manufacturing over the longer term. The 500,000 doses we delivered in December
were produced at the scale required for this stockpiling process.

We believe that our strong track record with the US Government, our partnership
with Baxter and our demonstrated ability to manufacture and deliver large
quantities of both MVA3000 and ACAM2000 put us in a very strong competitive
position. Whilst the RFP referred to a potential contract award date of February
2006, based on our experience and our understanding of the stage we are at in
the process, we believe it is now more likely that an award will be made in the
second quarter.

MVA litigation: confident of ability to defend freedom to operate

We are continuing vigorously to oppose any and all legal actions filed by
Bavarian Nordic (BN) with regard to MVA.

In February 2006, BN filed a suit against Acambis in Austria. This follows
complaints lodged with the International Trade Commission (ITC) and District
Court of Delaware in August 2005. Although Acambis has not yet been served with
the writ in the Austrian action, it is our understanding that the complaint
filed with the Commercial Court in Vienna alleges infringement of a European
patent awarded to Bavarian Nordic in December 2005. The European patent appears
to claim technology similar to BN's US patents, which are in dispute in the US
litigation.

The extensive discovery process for the ITC closes tomorrow, 10 March 2006.
Having completed the fact discovery process and obtained the opinions of experts
in the field, we are now outlining elements of our strategy to counter BN's
claims. The evidence listed below is based on information in the public domain
and is not derived from BN or other proprietary information protected from
release by the ITC. Further arguments will be presented to the ITC that, for
reasons of commercial sensitivity and by order of the ITC, are not being made
public and that, in several cases, are known only to outside counsel. Based on
current timelines, we expect to present our case in its entirety to the ITC at a
hearing scheduled for May 2006.

BN's legal actions include claims that relate to patents, trade secrets and
misappropriation. As illustrated below, Acambis will present evidence that each
of these allegations is without merit.

Patents

We have always believed and continue to believe that any patents awarded or
pending do not restrict our freedom to operate in the field of MVA. BN's patents
claim that other MVA viruses replicate in human cell lines but that its MVA
vaccine, MVA-BN, is "characterised by the loss of its capability to
reproductively replicate in human cells". Acambis' view is that BN's patents are
invalid and unenforceable. We will present factual and expert evidence that:

-    MVA-BN is not novel;
-    the patent is unenforceable through lack of enablement;
-    BN failed to provide the US Patent and Trademark Office with prior art
     related to its patent claims; and
-    the patents rely on scant scientific evidence.

We will demonstrate that MVA-BN is not novel because all MVA viruses, including
MVA-BN and prior art strains, have similar replication characteristics.

We would also point out that, under an "Authorisation and Consent" clause in our
contract, Acambis is authorised by the US Government to research and develop our
MVA regardless of third-party US patents to the extent necessary to perform the
NIAID contracts.

Trade secrets

On the question of the use of trade secrets, we will present evidence that the
information provided at a meeting between Acambis and Bavarian Nordic in June
2002 was not secret and, in any case, has not been used by Acambis. In
developing MVA3000, we have called upon our own experience, gained through the
ACAM2000 programme, and the experience of our partners, including using
established manufacturing practices. We have also used information gleaned from
the many articles published on MVA over the last 30 years, including those from
Dr Anton Mayr (see below). In addition, key parameters for the programme were
set by the NIAID, including dose level and dosing schedule.

Misappropriation

Dr Mayr provided an MVA strain to the NIH/NIAID. The NIAID then provided a
version of that strain to Acambis for use as the basis of MVA3000. As referenced
by an attorney at the ITC in a letter last September, Dr Mayr did not place in
writing any restriction on the NIH's use of the transferred MVA virus. We will
present further evidence that Dr Mayr did not restrict the use of the MVA strain
he provided to the NIH.

When the NIH released its first RFP, it made the NIH MVA strain publicly
available, stating that "collaborative opportunities from NIAID are available to
all legitimate parties and include: the availability of a master seed stock of
MVA from NIAID...". We requested and received the NIH MVA under a Material
Transfer Agreement that granted Acambis "worldwide, non-exclusive rights to
make, have made, and use" the NIH MVA "to sell and have sold, and to offer to
sell Commercial Products in the Field of Use of Smallpox Vaccines". During the
procurement process for the first MVA contract, although it did not undertake a
comprehensive review of intellectual property in the MVA field and encouraged us
to undertake our own analysis, the NIAID stated that "prior to distribution of
the material NIAID determined that it is within its rights to transfer the
material to other parties".

Opposition to European patents

As part of our broader strategy, we plan to file oppositions to the patent
issued to BN by the European Patent Organisation (EPO) on 28 December 2005.
Under the EPO's review process, there is a period of nine months from the date
of issuance for companies to submit objections to the patent.

When BN initiated the litigation process in August 2005, it stated at the time
that it was seeking to "...stop Acambis from engaging in the importation
of.....MVA smallpox vaccine products into the USA". BN's intent is clearly to
disrupt and frustrate competition in the MVA procurement process, both in the US
and elsewhere. We are, and always have been, very confident of our ability to
counter BN's allegations and will vigorously defend our freedom to compete for,
and win, these important procurements.

C-VIG: UK contract secured in 2005

During the course of 2005, we helped Cangene Corporation (Cangene) to win its
first major vaccinia immune globulin (VIG) contract outside the US. It was
awarded a C$17m (GBP8.5m) contract in September to supply doses of its C-VIG
product to the UK Government. As sales agent to Cangene, we receive a royalty on
the sales achieved under the contract.

RESEARCH AND DEVELOPMENT UPDATE

Our aim for 2005 was to take each of our proprietary programmes into the next
stage of development. In achieving this goal, we completed or initiated a total
of 12 clinical trials, which is a significant achievement for a company of our
size and stage of maturity.

ChimeriVax-JE: Phase 3 trials on track and Indian paediatric trial planned for
second quarter

Our ChimeriVax-JE vaccine against the mosquito-borne Japanese encephalitis (JE)
virus is now undergoing pivotal Phase 3 testing. The two clinical trials, which
are being conducted in multiple centres in Australia and the US, are testing the
safety and efficacy of a single-dose regimen of ChimeriVax-JE in more than 2,800
subjects. The trials, which were initiated in November 2005, are progressing
extremely well, with enrolment in both trials ahead of schedule and nearing
completion.

Preparations are underway to start a Phase 2 paediatric trial in India, where
children are the primary target population for a JE vaccine. The paediatric data
will supplement those generated in our ongoing Phase 3 trials and our previous
Phase 1 and 2 studies to support licence applications for both the endemic
regions and the travel market. We are targeting submissions of licence
applications in both India and Australia in the first half of 2007.

There is a large unmet public health need for a single-dose, convenient and
affordable vaccine against JE, which could make it simpler, faster, easier and
cheaper for healthcare providers to administer vaccines, particularly in regions
where achieving compliance to multi-dose regimens can be difficult.  An epidemic
in northern India in 2005 resulted in 6,340 cases and more than 1,200 deaths,
mostly of children.

India is one of our primary markets for ChimeriVax-JE and to support
commercialisation of the vaccine in the region we established a partnership with
one of India's leading biotechnology companies, Bharat Biotech International
Limited (Bharat Biotech), at the end of 2005. Under the partnership, Bharat
Biotech will undertake end-stage fill/finish processing of ChimeriVax-JE at its
facilities in India and, once the product is approved, will market and
distribute the vaccine in India and neighbouring countries. We are currently
pursuing the necessary import and export requirements with a view to completing
technology transfer to Bharat in time to use material produced by Bharat in
planned Phase 3 trials in India. We are also pursuing partnerships to target
other endemic countries and the travellers' market.

ChimeriVax-West Nile: first company into Phase 2 trials

We are continuing to lead the field in developing a human vaccine against the
mosquito-borne West Nile virus, which is endemic in the US. Having become the
first company to complete a Phase 1 trial, we were also the first to enter Phase
2 clinical testing.

We initiated a Phase 2 trial in December 2005 to test our vaccine in more than
200 subjects in the US. The aim of the randomised, double-blind,
placebo-controlled trial is to evaluate the safety, tolerability and
immunogenicity of ChimeriVax-West Nile in healthy adults and elderly subjects.
Having tested different dose levels in young adults, the optimal dose will be
taken forward for testing in subjects aged 50 and above. This age group is
likely to be the initial target population for a West Nile vaccine as they are
at most risk of severe disease following infection. Recruitment for the healthy
adults portion of the trial is nearing completion.

In our Phase 1 safety and immunogenicity trial, results from which were
published in April, of the subjects who received a single dose of
ChimeriVax-West Nile, 96% in the high-dose group and 100% in the low-dose group
developed high titres of West Nile-neutralising antibodies 28 days after
vaccination.

Intervet, which is the number one manufacturer of animal vaccines, is aiming to
launch its West Nile veterinary vaccine in the US during the 2006 season. The
West Nile virus is a particular problem for horses. Intervet's vaccine was
developed from the ChimeriVax technology licensed from Acambis and we will
receive royalties from sales of the Intervet product.

Clostridium difficile (C. difficile): encouraging results from first Phase 1
trial

We have recently announced results from the first of two Phase 1 trials of our
vaccine against C. difficile, a leading cause of hospital-acquired infections.
In the 50-subject placebo-controlled trial in healthy adults, antibody responses
were seen in all 37 subjects who received our vaccine. No subjects experienced
unexpected or serious vaccine-related adverse events.

Enrolment is now complete in a second Phase 1 trial designed to explore the
safety, tolerability and immunogenicity of our vaccine in healthy elderly
subjects at different dose levels. This is the first trial of our vaccine in one
of the key target populations for the product. We aim to complete Phase 1
testing in the second half of the year and then to begin Phase 2 trials.

ChimeriVax-Dengue: sanofi pasteur progresses into Phase 2

Following completion of the Phase 1 trial of a tetravalent formulation of our
ChimeriVax-Dengue in the first quarter of 2005, the lead responsibility for
further clinical testing and development passed during 2005 to sanofi pasteur
(SP), to whom we have licensed worldwide rights. Results from the trial showed
seroconversion to all four dengue virus serotypes. SP has progressed the vaccine
into Phase 2 clinical trials.

Influenza: new project added to pipeline could be in clinical trials next year

In August, we announced that we have initiated a programme to develop a
universal influenza vaccine, which is seen as the holy grail of influenza
protection. The aim of the programme is to develop a vaccine that can target all
strains of influenza, removing the need for annual reformulations and annual
vaccinations.

To achieve this, we acquired a technology previously being developed by Apovia,
a US-based biotechnology company, and established a research collaboration with
VIB, a Belgian research institute. A major component of the new candidate(s) is
M2e, the extracellular domain of the ion channel protein M2, which is specific
to influenza A. Being highly conserved, M2e is intended to elicit protective
immune responses against all strains of influenza A.

While our ultimate goal is to develop a vaccine that is universally effective
against all "A" and "B" strains of the influenza virus, which would be required
for complete protection against seasonal influenza, we are also pursuing
development of an "A" strain candidate as this could be suitable as a vaccine
against pandemic influenza. All previous pandemics have been caused by "A"
strains of the virus. With a vaccine that targets all "A" strains, governments
would be able to stockpile vaccine doses for use in the event of a pandemic
instead of waiting for the appropriate strain to be identified before vaccine
manufacture can be undertaken.

Pre-clinical development of our pandemic vaccine candidate is ongoing and we aim
to enter clinical trials in early 2007. Our longer term programme is currently
at the research stage.

VIVOTIF(R)

Vivotif, the oral typhoid vaccine we sell in the US, had a strong year in 2005,
with sales volumes 81% up over 2004. This was primarily as a result of our
ability to capitalise on the competitor product's lack of availability for part
of the year.

ARILVAXTM

Acambis has US sales and marketing rights to ARILVAX, a yellow fever vaccine
that is owned and manufactured by Chiron. We are in ongoing discussions with
Chiron to resolve a way forward for the ARILVAX programme. To date these have
been constructive and we hope to conclude the discussions in the near future.

FINANCIAL REVIEW

The financial results for the year ended 31 December 2005 are presented below. A
high-level summary of the results for the three months ended 31 December 2005 is
also shown.

Trading results

Revenue for the year was GBP40.9m (2004 - GBP85.5m), which is in line with the
predictable revenue guidance given throughout 2005. The main sources of revenue
during 2005 were our two contracts with the NIAID for MVA3000, the fixed-price
155 million-dose ACAM2000 contract with the CDC and product sales of Vivotif. In
2004, revenues also included sales of 27.5 million doses of the ACAM2000 vaccine
to the CDC.

Cost of sales in 2005 decreased to GBP27.6m  (2004 - GBP35.0m).  These costs are
in line with revenues generated in the year.

Our gross profit margin for the year decreased to 32.5% (2004 - 59.1%). This
represents the change in the mix of revenues recorded in the two years. During
2004, the gross margin was positively impacted by the reassessment and reduction
of costs under the 155 million-dose contract following the decision to close out
the two Phase 3 clinical trials early.

Expenditure  on R&D  increased  in the year to GBP34.1m  (2004 - GBP29.3m)  as a
result of the  successful  progression  of our  projects  into  later  stages of
development,  most notably the  initiation  of Phase 3 trials for  ChimeriVax-JE
during the second  half of 2005.  We  continue  to expense  certain of the costs
relating to our  manufacturing  facility to R&D in line with  utilisation of the
facility for process  development and manufacturing work for our R&D programmes.
During 2005,  we also  started to incur  operational  costs for our  fill/finish
facility.

Sales  and  marketing   costs  in  the  year  were  GBP2.6m  (2004  -  GBP2.8m).
Administrative  costs were  GBP7.7m  (2004 - GBP5.5m)  and  include  costs and a
provision,  together  totalling around GBP3m, in relation to the MVA litigation.
In  2004,  administrative  costs  included  two  non-cash  exceptional  items of
GBP2.6m.

During 2004, the Group also recorded GBP10.2m of exceptional other operating
income relating to the settlement with Baxter in respect of the termination of a
contract manufacturing agreement.

Interest receivable in the year was GBP4.0m (2004 - GBP4.8m).  The reduction was
as a result of lower cash  levels  during  2005  compared  with  2004.  Interest
payable was GBP1.0m (2004 - GBP0.9m), which primarily comprised interest payable
on the  lease-financing  facility that was put in place for the  reactivation of
our manufacturing plant in Canton, MA.

Pre-tax  loss for 2005 was GBP27.7m  (2004 - pre-tax  profit of  GBP27.0m).  The
change  compared  with 2004 is primarily a result of higher  revenue,  increased
gross margin and exceptional income recorded during 2004 and increased R&D costs
in 2005. This is in line with management's expectations.

In 2005, we recorded a tax credit of GBP1.7m (2004 - charge of GBP7.3m). The
effective tax rate for 2005 was 6.1% (2004 - 27.0%). The lower effective tax
rate in 2005 is principally a result of being in a loss-making position during
the period leading to the refund of certain taxes paid in previous profitable
periods and movements in deferred tax liabilities.

Investing activities

During 2005, we spent GBP1.7m (2004 - GBP0.8m) on the final payments for the BPC
acquisition which increased in 2005, in part, as a result of achieving higher
sales of Vivotif.

Capital expenditure in 2005 was GBP3.7m (2004 - GBP3.4m). Expenditure during the
year related to the costs to redevelop and expand areas of our US R&D facility,
as well as the acquisition of assets for our Rockville fill/finish facility,
which was purchased in May 2005.

Balance sheet highlights

i)          Cash/debtors

Cash, cash  equivalents and liquid  investments of the Group at 31 December 2005
amounted to GBP68.0m  (31  December  2004 -  GBP101.8m).  The  reduction in cash
during  the  year is a  result  of  increased  investment  in the R&D  pipeline,
together with the capital investments in the US R&D facility and the acquisition
of the Rockville fill/finish facility.

During the year, Trade and other receivables increased to GBP20.6m (31 December
2004 - GBP13.7m), principally as a result of an amount owing at the end of 2005
relating to the shipment of 500,000 doses of MVA3000 vaccine to the NIAID under
the MVA3000 contract.  This debtor has been settled since the year-end.

ii)          Inventory

Inventory  held at 31 December  2005  amounted to GBP3.6m  (31  December  2004 -
GBP6.0m). The balance principally represents work-in-progress and finished goods
in relation to our ACAM2000 and Vivotif vaccines. The reduction seen in the year
is partly a result of a provision  made against  ACAM2000  inventory  during the
third quarter of 2005.

iii)         Current liabilities: amounts falling due in one year

At 31 December  2005,  current  liabilities  were  GBP46.6m (31 December  2004 -
GBP47.6m).  A proportion of this balance relates to accruals and deferred income
arising  under  the  ACAM2000  155  million-dose  contract  with the CDC.  At 31
December  2005,  deferred  income  relating  to this  contract  was  GBP2.0m (31
December 2004 - GBP16.5m).  The deferred revenue balance will unwind during 2006
as the BLA submission process concludes.  Trade and other payables were GBP16.1m
at 31 December  2005 (31  December  2004 - GBP8.3m).  The increase at the end of
2005 was  principally  attributable  to the trade  creditor  to  Baxter  for the
production of 500,000 doses of MVA3000. This creditor has been settled since the
year-end.

iii)          Short-term borrowings and financial liabilities

The  combined  balance of our US  dollar-denominated  financing  facilities  was
GBP12.8m at 31 December 2005 (31 December  2004 - GBP13.0m).  The balance on the
lease-financing  facility was GBP7.2m at 31 December  2005 (31  December  2004 -
GBP9.4m).  The balance on the overdraft facility at 31 December 2005 was GBP4.0m
(31 December 2004 - GBP3.6m),  the increase being  attributable to exchange rate
movements in the period.  The  remaining  balance of GBP1.6m at 31 December 2005
(31  December  2004 - GBPnil)  relates  to the  discounted  value of the  future
payments  for the  Rockville  fill/finish  facility  acquired  earlier  in 2005,
payable between 2006 and 2017.

Fourth quarter results

The following section summarises the financial highlights for the three months
ended 31 December 2005 ("Q4"). Unless stated otherwise, the comparative figures
in parentheses relate to the equivalent three-month period in 2004.

Revenues in Q4 were  GBP23.9m  (2004 -  GBP23.1m)  and  principally  represented
income from the two NIAID contracts for MVA3000,  the ACAM2000 155  million-dose
contract  and  sales  of  Vivotif.  Cost of  sales  was  GBP13.3m  in Q4 (2004 -
GBP10.8m),  representing the higher  proportion of revenue in 2005 for the lower
gross margin MVA contracts  over 2004.  R&D costs  increased to GBP10.7m (2004 -
GBP7.4m),  the increase being  primarily  attributable  to the  preparation  and
commencement of the Phase 3 trials of ChimeriVax-JE.  In Q4, we recorded GBP0.6m
(2004 - GBP0.8m) of sales and marketing costs. Administrative costs were GBP4.9m
in Q4 (2004 - GBP0.9m),  which  included a provision  for the defence of the MVA
litigation as highlighted above.

The  pre-tax  loss in Q4 was GBP5.1m  (2004 - pre-tax  profit of  GBP4.4m).  The
change in the periods  reflects the change in mix of revenues and gross  margins
over the two periods.

Capital expenditure remained constant in Q4 at GBP0.7m (2004 - GBP0.7m).

OUTLOOK AND GUIDANCE

Recent years have demonstrated that the vaccines industry is an increasingly
attractive area, with improvements in pricing, increased government or
supranational investment and a higher public profile. From biodefence to
pandemic influenza, hospital-acquired infections to emerging viruses and
bacteria, vaccines are recognised as the front line of public health.

As one of the leading independent vaccine companies, Acambis is well placed
within the sector. We further strengthened our pipeline by driving our
development programmes forward in 2005 and have built a useful infrastructure to
enable us not only to develop but also to manufacture and sell our vaccines. We
continue to be committed to our strategy of investing in our programmes
ourselves, wherever possible, in order to retain product rights and generate
greater long-term value.

Our investment in R&D delivered significant progress in 2005 and by continuing
that strategy in 2006 we expect to see further good progress from our pipeline
this year. Preliminary results from our ongoing Phase 3 trial of ChimeriVax-JE
should be available later this year, by when we will also have completed the
Phase 2 paediatric trial in India and initiated the Indian Phase 3 trial. In
addition, the second half of the year will see results from our Phase 2 trial of
ChimeriVax-West Nile and the transition of our C. difficile vaccine into Phase
2. Based on the fast-track status awarded to our ACAM2000 programme, we would
hope to receive the FDA's decision on our licence application before the end of
2006. Given this extensive clinical trial programme, we expect our investment in
R&D to increase to around GBP40-45m in 2006. This includes a significant
investment in the Phase 3 trials for ChimeriVax-JE.

We are confident that during 2006 we will also achieve greater clarity around
our smallpox franchise. Based on indications from the CDC, we continue to expect
to sign and initiate a US Government warm-base manufacturing contract for
ACAM2000 and we also expect to receive a decision on the US MVA stockpiling
tender process in the second quarter. In the MVA litigation process, the first
of the US court cases is due to be heard in May and a decision is expected in
the second half of the year.

As in previous years, some of our revenues in 2006 will be more predictable than
others, namely those from sales of Vivotif and existing ACAM2000 and MVA3000
contracts. We estimate that, depending upon the timing of activities for the
existing smallpox contracts, our predictable revenues in 2006 will be GBP20-25m.
We would expect the gross profit margin on these activities to be similar to
that achieved in 2005. There is significant potential for additional revenues
from contracts we are currently pursuing, particularly further ACAM2000 and
MVA3000 US Government contracts. We will give guidance on our revenue
expectations in these areas as and when contracts are awarded.


Contacts




Acambis plc                                        Today                    Thereafter
                                                                                       
Gordon Cameron, Chief Executive Officer            +44 (0) 20 7831 3113     +44 (0) 1223 275 300
David Lawrence, Chief Financial Officer            +44 (0) 20 7831 3113     +44 (0) 1223 275 300
Lyndsay Wright, VP, Communications and IR          +44 (0) 20 7831 3113     +44 (0) 1223 275 300

Financial Dynamics
David Yates/Anna Keeble                            +44 (0) 20 7831 3113



About Acambis

Acambis is a leading developer of vaccines to prevent and treat infectious
diseases. Recognised internationally as the leading producer of smallpox
vaccines, Acambis is developing an investigational smallpox vaccine, ACAM2000,
and is manufacturing emergency-use stockpiles of this investigational vaccine
for the US Government and other governments around the world. It is also
developing an attenuated smallpox vaccine, MVA3000, under contracts with the US
National Institutes of Health. Acambis' US-based subsidiary Berna Products
Corporation markets Vivotif(R), the world's only licensed oral typhoid vaccine,
in North America. Acambis' investigational vaccine against Japanese
encephalitis, ChimeriVax-JE, is undergoing Phase 3 clinical testing. It also has
the most advanced investigational vaccine against the West Nile virus, which has
spread to 48 US States in the last six years, and a vaccine against Clostridium
difficile bacteria, a leading cause of hospital-acquired infections.

Acambis is based in Cambridge, UK and Cambridge, Massachusetts, US. Its primary
listing is on the London Stock Exchange (ACM) and its shares are listed in the
form of American Depositary Receipts on NASDAQ (ACAM). More information is
available at www.acambis.com.

"Safe Harbor" statement under the Private Securities Litigation Reform Act of
1995:

The statements in this news release that are not historical facts are
forward-looking statements that involve risks and uncertainties, including the
timing and results of clinical trials, product development, manufacturing and
commercialisation risks, the risks of satisfying the regulatory approval process
in a timely manner, the need for and the availability of additional capital. For
a discussion of these and other risks and uncertainties see "Risk management" in
the Company's 2004 Annual Report and "Risk factors" in its Form 20-F, in
addition to those detailed on the Company's website and in the Company's filings
made with the Securities and Exchange Commission from time to time. These
forward-looking statements are based on estimates and assumptions made by the
management of Acambis and are believed to be reasonable, though are inherently
uncertain and difficult to predict. Actual results or experience could differ
materially from the forward-looking statements.


Results for the three and twelve months ended 31 December 2005

Group income statement




                                           Three months       Three months             Year               Year
                                                  ended              ended            ended              ended
                                            31 December        31 December      31 December        31 December
                                                   2005               2004             2005               2004
                                            (unaudited)        (unaudited)      (unaudited)        (unaudited)
                                                   GBPm               GBPm             GBPm               GBPm

                                                                                               
Revenue                                            23.9               23.1             40.9               85.5
Cost of sales                                    (13.3)             (10.8)           (27.6)             (35.0)
                                                  _____              _____            _____              _____
Gross profit                                       10.6               12.3             13.3               50.5

Research and development costs                   (10.7)              (7.4)           (34.1)             (29.3)
Sales and marketing costs                         (0.6)              (0.8)            (2.6)              (2.8)
Administrative costs (including                   (4.9)              (0.9)            (7.7)              (5.5)
costs relating to Canton plant
impairment and restructuring costs)
Other operating income: Settlement                    -                  -                -               10.2
of Canton agreement
Other operating income: Fair value                    -                  -              0.4                  -
of shares received for grant of
licence                                           _____              _____            _____              _____
Operating (loss)/profit                           (5.6)                3.2           (30.7)               23.1

Finance income                                      0.8                1.5              4.0                4.8
Finance costs                                     (0.3)              (0.3)            (1.0)              (0.9)

                                                  _____              _____            _____              _____
(Loss)/profit on ordinary                         (5.1)                4.4           (27.7)               27.0
activities before taxation

Taxation: UK                                      (1.3)              (0.6)            (1.5)              (3.7)
Taxation: Overseas                                  0.2                1.0              3.2              (3.6)

                                                  _____              _____            _____              _____
(Loss)/profit on ordinary                         (6.2)                4.8           (26.0)               19.7
activities after taxation
                                                  _____              _____            _____              _____

Basic (loss)/earnings per 10p                    (5.8)p               4.5p          (24.3)p              18.5p
ordinary share (in pence)
Basic (loss)/earnings per ADR (in               $(0.20)              $0.17          $(0.83)              $0.71
$) (note 2)
Diluted (loss)/earnings per 10p                  (5.8)p               4.4p          (24.3)p              18.1p
ordinary share (in pence)
Weighted average number of ordinary         107,261,327        106,829,271      107,211,367        106,300,080
shares in issue - basic
Weighted average number of ordinary         107,261,327        109,178,579      107,211,367        108,649,389
shares in issue - diluted





Group balance sheet as at 31 December 2005



                                                                                        As at             As at
                                                                                  31 December       31 December
                                                                                         2005              2004
                                                                                  (unaudited)       (unaudited)
                                                                                         GBPm              GBPm
                                                                                                      
Non-current assets
Goodwill                                                                                 14.9              15.4
Other intangible assets                                                                   4.2               4.1
Property, plant and equipment                                                            19.8              18.5
Deferred tax asset                                                                        0.3                 -
Financial assets: available for sale investments                                          0.6                 -
Other non-current assets                                                                    -               2.5
                                                                                        _____             _____
                                                                                         39.8              40.5

Current assets
Inventory                                                                                 3.6               6.0
Current tax assets                                                                        2.1               1.9
Trade and other receivables                                                              20.6              13.7
Financial assets: derivative financial instruments                                        0.1                 -
Liquid investments                                                                       18.8              20.8
Cash and cash equivalents                                                                49.2              81.0
                                                                                        _____             _____
                                                                                         94.4             123.4

Current liabilities
Financial liabilities:
 - short-term borrowings                                                                (4.0)             (3.6)
- short-term financial liabilities                                                      (7.2)             (3.1)
- derivative financial instruments                                                          -             (0.1)
Trade and other payables                                                               (16.1)             (8.3)
Accruals and deferred income                                                           (14.1)            (27.9)
Income tax payable                                                                      (2.9)             (4.6)
Provisions                                                                              (2.3)                 -
                                                                                        _____             _____
                                                                                       (46.6)            (47.6)
                                                                                        _____             _____

Net current assets                                                                       47.8              75.8
                                                                                        _____             _____

Total assets less current liabilities                                                    87.6             116.3

Non-current liabilities
Investment in Joint Venture                                                             (0.3)             (0.3)
Long-term financial liabilities                                                         (1.6)             (6.3)
Other non-current liabilities                                                               -             (0.5)
Deferred tax liabilities                                                                (1.7)             (1.7)
                                                                                        _____             _____
                                                                                        (3.6)             (8.8)
                                                                                        _____             _____

Net assets                                                                               84.0             107.5
                                                                                        _____             _____

Shareholders' equity
Share capital                                                                            10.7              10.7
Share premium                                                                            98.0              97.8
Other reserves                                                                          (0.9)             (2.5)
Retained earnings                                                                      (23.8)               1.5
                                                                                        _____             _____
Total shareholders' equity                                                               84.0             107.5
                                                                                        _____             _____




Group cash flow statement




                                                    Three months    Three months            Year            Year
                                                           ended           ended           ended           ended
                                                     31 December     31 December     31 December     31 December
                                                            2005            2004            2005            2004
                                                     (unaudited)     (unaudited)     (unaudited)     (unaudited)
                                                            GBPm            GBPm            GBPm            GBPm
                                                                                                 
Operating activities
(Loss)/profit on ordinary activities before tax            (5.1)             4.4          (27.7)            27.0
Depreciation and amortisation                                2.1             1.1             5.3             6.3
Increase in working capital                                (5.8)          (16.7)           (2.8)          (51.1)
Other non-cash movements                                   (0.2)             0.9           (0.7)             2.6
Net finance costs                                          (0.5)           (1.2)           (3.0)           (3.9)
Taxes received/(paid)                                        5.0           (0.3)           (0.4)           (1.6)
                                                           _____           _____           _____           _____
Cash flows from operating activities                       (4.5)          (11.8)          (29.3)          (20.7)

Investing activities
Purchase of business operations                            (0.3)           (0.2)           (1.7)           (0.8)
Disposal of investments                                        -               -               -             0.7
Purchase of intangibles                                        -               -           (0.4)               -
Purchase of property, plant and equipment                  (0.7)           (0.7)           (3.7)           (3.4)
                                                           _____           _____           _____           _____
Cash flows used in investing activities                    (1.0)           (0.9)           (5.8)           (3.5)

Financing activities
Interest element of finance lease payments                 (0.2)           (0.2)           (0.6)           (0.7)
Interest paid                                              (0.1)               -           (0.2)           (0.1)
Interest received                                            0.8             1.3             3.8             4.4
Proceeds from issue of shares                                  -             1.1             0.2             1.9
Purchase of own shares                                         -               -           (0.2)               -
Capital element of finance lease payments                  (0.9)           (0.9)           (3.3)           (2.5)
Purchase of liquid investments                             (8.8)           (9.3)          (34.8)          (62.7)
Sale of liquid investments                                   4.0            24.4            36.8            59.7
                                                           _____           _____           _____           _____
Cash flows from financing activities                       (5.2)            16.4             1.7               -
                                                           _____           _____           _____           _____

(Decrease)/increase in cash and cash                      (10.7)             3.7          (33.4)          (24.2)
equivalents

Net foreign exchange difference                              0.4           (1.8)             1.6           (2.2)
Cash and cash equivalents opening balance                   59.5            79.1            81.0           107.4

                                                           _____           _____           _____           _____
Cash and cash equivalents closing balance                   49.2            81.0            49.2            81.0
                                                           _____           _____           _____           _____





Reconciliation of movements in Group shareholders' equity




                                                                                    As at                 As at
                                                                              31 December           31 December
                                                                                     2005                  2004
                                                                              (unaudited)           (unaudited)
                                                                                     GBPm                  GBPm

                                                                                                       
Retained (loss)/profit for the period                                              (26.0)                  19.7
Gain/(loss) on foreign currency exchange                                              1.6                 (2.5)
Revaluation of available for sale investments                                         0.1                     -
Credit in respect of employee share schemes                                           0.8                   0.7
Tax in respect of employee share schemes                                                -                   1.2
                                                                                    _____                 _____
                                                                                   (23.5)                  19.1
New share capital subscribed                                                          0.2                   1.9
Purchase of Treasury shares                                                         (0.2)                     -
                                                                                    _____                 _____
Net (decrease)/increase in shareholders' equity                                    (23.5)                  21.0
Opening shareholders' equity                                                        107.5                  86.5
                                                                                    _____                 _____
Closing shareholders' equity                                                         84.0                 107.5
                                                                                    _____                 _____




Notes

1.       Basis of preparation

The financial information for the three and twelve months ended 31 December 2005
is unaudited and has been prepared in accordance with the Group's accounting
policies, based on IFRS, as adopted by the European Union. The financial
information for the three and twelve months ended 31 December 2004 is also
unaudited and has been restated under IFRS. Restated financial information for
the year ended 31 December 2004 was published in May 2005.

This summary of results does not constitute the full financial statements within
the meaning of s240 of the Companies Act 1985. The 2004 financial statements
have been reported on by the Company's auditors and have been delivered to the
Registrar of Companies. The audit report was unqualified and did not contain a
statement under s237(2) or s237(3) of the Companies Act 1985.


2.        (Loss)/earnings per ADR (basic)

Each American Depository Receipt (ADR) represents two ordinary shares. The basic
earnings per ADR is calculated by multiplying the earnings per ordinary share by
a factor of two and then multiplying by the prevailing US dollar exchange rate
at the end of the relevant period. The exchange rates used are 1.7168 and 1.9199
for the year to 31 December 2005 and 31 December 2004 respectively.


3.        Directors' responsibility

The Directors are responsible for the maintenance and integrity of the Group's
website. The Company notes that UK legislation governing the preparation and
dissemination of financial information may differ from that required in other
jurisdictions.



                                      SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant Peptide Therapeutics Group has duly caused this report to be
signed on its behalf by the undersigned, thereunto duly authorized.



Date: 9 March 2006                      ACAMBIS PLC





                                        By:  /s/ Lyndsay Wright
                                             Name: Lyndsay Wright
                                             Title: VP, Communications and IR.