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 May 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- ).




Enclosures:

1. Holding(s) in Company
2. Holding(s) in Company
3. Holding(s) in Company
4. Holding(s) in Company
5. Holding(s) in Company
6. Holding(s) in Company



Enclosure No. 1

                                  SCHEDULE 10

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES


1. Name of company

Acambis plc


2. Name of shareholder having a major interest

Barclays PLC


3. Please state whether notification indicates that it is in respect of holding
of the shareholder named in 2 above or in respect of a non-beneficial interest
or in the case of an individual holder if it is a holding of that person's
spouse or children under the age of 18

As above


4. Name of the registered holder(s) and, if more than one holder, the number of
shares held by each of them

The legal entities holding these shares are as follows:
Gerrard Ltd 9,065 shares
Barclays Life Assurance Co Ltd 147,775 shares
Barclays Global Investors Ltd 1,431,312 shares
Barclays Bank PLC 1,101,104 shares
Barclays Capital Securities Ltd 1,261,536 shares
Barclays Capital Inc 7,116 shares


5. Number of shares / amount of stock acquired

Not disclosed


6. Percentage of issued class

Not disclosed


7. Number of shares / amount of stock disposed

N/A


8. Percentage of issued class

N/A


9. Class of security

Ordinary shares of 10p each


10. Date of transaction

Not disclosed


11. Date company informed

3 May 2006


12. Total holding following this notification

3,957,908 shares


13. Total percentage holding of issued class following this notification


3.69%


14. Any additional information

N/A


15. Name of contact and telephone number for queries

Elizabeth Brown tel: 01223 275300


16. Name and signature of authorised company official responsible for making
this notification

Elizabeth Brown, Company Secretary


Date of notification

4 May 2006


The FSA does not give any express or implied warranty as to the accuracy of this
document or material and does not accept any liability for error or omission.
The FSA is not liable for any damages (including, without limitation, damages
for loss of business or loss of profits) arising in contract, tort or otherwise
from the use of or inability to use this document, or any material contained in
it, or from any action or decision taken as a result of using this document or
any such material.




Enclosure No. 2

                                  SCHEDULE 10

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES


1. Name of company

Acambis plc


2. Name of shareholder having a major interest

Legal & General Investment Management Limited


3. Please state whether notification indicates that it is in respect of holding
of the shareholder named in 2 above or in respect of a non-beneficial interest
or in the case of an individual holder if it is a holding of that person's
spouse or children under the age of 18

As above


4. Name of the registered holder(s) and, if more than one holder, the number of
shares held by each of them

HSBC Global Custody Nominee (UK) Ltd - various accounts


5. Number of shares / amount of stock acquired

N/a


6. Percentage of issued class

N/a


7. Number of shares / amount of stock disposed

Not disclosed


8. Percentage of issued class

Not disclosed


9. Class of security

Ordinary shares of 10p each


10. Date of transaction

Not disclosed


11. Date company informed

4 May 2006


12. Total holding following this notification

6,423,031 shares


13. Total percentage holding of issued class following this notification

5.98%


14. Any additional information

N/a


15. Name of contact and telephone number for queries

Elizabeth Brown, Company Secretary
+44 (0) 1223 275 300


16. Name and signature of authorised company official responsible for making
this notification

Elizabeth Brown


Date of notification

5 May 2006


The FSA does not give any express or implied warranty as to the accuracy of this
document or material and does not accept any liability for error or omission.
The FSA is not liable for any damages (including, without limitation, damages
for loss of business or loss of profits) arising in contract, tort or otherwise
from the use of or inability to use this document, or any material contained in
it, or from any action or decision taken as a result of using this document or
any such material.





Enclosure No. 3

Holding in Company


Cambridge, UK and Cambridge, Massachusetts - 8 May 2006 - Acambis plc
("Acambis") (LSE: ACM, NASDAQ: ACAM) announces an interest in its shares by The
Goldman Sachs Group, Inc.


On 5 May 2006, Acambis received notification that, as of the close of business
on 3 May 2006, The Goldman Sachs Group, Inc., ("GS Inc") of 85 Broad Street, New
York, NY 10004, USA, was interested in a total of 4,314,554 ordinary shares of
10p each, representing a 4.02% holding of Acambis' issued share capital.


Of these 4,314,554 shares:


a)   the interest in 435,528 shares arose from an interest held
by Goldman, Sachs & Co. ("GS&Co."), a direct subsidiary of GS Inc., acting as
custodian; these shares are, or will be, registered in the name of Goldman Sachs
Securities (Nominees), Limited ("GSSN");


b)   the interest in 3,700 shares arose from an interest held by
GS&Co, acting as custodian of 1,850 American Depositary Receipts ("ADRs"); these
ADRs are, or will be, held at The Depositary Trust Company, New York;


c)   the interest in 3,875,326 shares arose from a beneficial
interest held by Goldman Sachs International, a direct subsidiary of GS Inc;
these shares are, or will be, registered at CREST in account CREPTEMP.


                                     -ends-


Enquiries:


Acambis plc

Elizabeth Brown, Company Secretary:

Tel: +44 (0) 1223 275 300

Lyndsay Wright, VP, Communications and Investor Relations:

Tel: +44 (0) 1223 275 300


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 seven 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.





Enclosure No. 4

                                  SCHEDULE 10

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES


1. Name of company

Acambis plc


2. Name of shareholder having a major interest

Barclays PLC


3. Please state whether notification indicates that it is in respect of holding
of the shareholder named in 2 above or in respect of a non-beneficial interest
or in the case of an individual holder if it is a holding of that person's
spouse or children under the age of 18

As above


4. Name of the registered holder(s) and, if more than one holder, the number of
shares held by each of them

The legal entities holding these shares are as follows:
Barclays Bank PLC 1,519,251 shares
Barclays Capital Securities Ltd 1,288,570 shares
Barclays Global Investors Ltd 1,431,312 shares
Barclays Capital Inc 7,720 shares
Barclays Life Assurance Co Ltd 147,775 shares
Gerrard Ltd 9,065 shares


5. Number of shares / amount of stock acquired

Not disclosed


6. Percentage of issued class

Not disclosed


7. Number of shares / amount of stock disposed

N/A


8. Percentage of issued class

N/A


9. Class of security

Ordinary shares of 10p each


10. Date of transaction

Not disclosed


11. Date company informed

8 May 2006


12. Total holding following this notification

4,403,693 shares


13. Total percentage holding of issued class following this notification

4.10%


14. Any additional information

N/A


15. Name of contact and telephone number for queries

Elizabeth Brown tel: 01223 275300


16. Name and signature of authorised company official responsible for making
this notification

Elizabeth Brown, Company Secretary


Date of notification

8 May 2006


The FSA does not give any express or implied warranty as to the accuracy of this
document or material and does not accept any liability for error or omission.
The FSA is not liable for any damages (including, without limitation, damages
for loss of business or loss of profits) arising in contract, tort or otherwise
from the use of or inability to use this document, or any material contained in
it, or from any action or decision taken as a result of using this document or
any such material.





Enclosure No. 5

Holding in Company



Cambridge, UK and Cambridge, Massachusetts - 11 May 2006 - Acambis plc
("Acambis") (LSE: ACM, NASDAQ: ACAM) announces that it received notification on
10 May 2006 that as from 8 May 2006 Barclays PLC no longer held a notifiable
interest in the share capital of Acambis.


                                     -ends-


Enquiries:


Acambis plc

Elizabeth Brown, Company Secretary             Tel: +44 (0) 1223 275 300

Lyndsay Wright, VP, Communications and Investor
Relations



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 seven 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.



Enclosure No. 6

Holding in Company


Cambridge, UK and Cambridge, Massachusetts - 30 May 2006 - Acambis plc
("Acambis") (LSE: ACM, NASDAQ: ACAM) announces an interest in its shares by The
Goldman Sachs Group, Inc.

On 26 May 2006, Acambis received notification that, as of the close of business
on 24 May 2006, The Goldman Sachs Group, Inc., ("GS Inc") of 85 Broad Street,
New York, NY 10004, USA, was interested in a total of 5,455,883 ordinary shares
of 10p each, representing a 5.08% holding of Acambis' issued share capital.

Of these 5,455,883 shares:

a)     the interest in 253,495 shares arose from an interest held by Goldman,
Sachs & Co. ("GS&Co."), a direct subsidiary of GS Inc., acting as custodian;
these shares are, or will be, registered in the name of Goldman Sachs
Securities (Nominees), Limited ("GSSN");


b)     the interest in 3,700 shares arose from an interest held by GS&Co, acting
as custodian of 1,850 American Depositary Receipts ("ADRs"); these ADRs are, or
will be, held at The Depositary Trust Company, New York;


c)     the interest in 5,198,688 shares arose from a beneficial interest held by
Goldman Sachs International, a direct subsidiary of GS Inc; these shares are, or
will be, registered at CREST in account CREPTEMP.



                                     -ends-


Enquiries:


Acambis plc

Elizabeth Brown, Company Secretary: Tel: +44 (0) 1223 275 300
Lyndsay Wright, VP, Communications and Investor Relations:
Tel: +44 (0) 1223 275 300


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 seven 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 2005 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.






                                      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: 31 May 2006                      ACAMBIS PLC





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