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 October, 2005


                                  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. Directors' Interests in Share
2. Holding(s) in Company




Directors' interests in shares

Cambridge, UK and Cambridge, Massachusetts - 14 October 2005 - Acambis plc
("Acambis") (LSE: ACM, NASDAQ: ACAM) announces that, on 5 October, the following
grants of options under the Acambis 1995 Savings-Related Share Option Scheme
were made to two Executive Directors:

Gordon Cameron: share options 4,651; total shares over which options held 
(Note 1) 730,982
David Lawrence: share options 4,651; total shares over which options held 
(Note 1) 298,630 

The share options were granted over ordinary 10p shares at an exercise price of
201p per share. The exercise periods applicable are 1 December 2008 to 1 June
2009. No amount was payable by the Directors on the grant of these share
options.

Note 1: The total shares over which options are held (share options and
long-term incentive awards) following the above transactions detailed within
this news release.

Enquiries:


Acambis plc

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

                                     -ends-
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 is establishing a travel vaccines
franchise through its US-based subsidiary Berna Products Corporation, which
markets Vivotif(R), the world's only licensed oral typhoid vaccine, in North
America. Acambis has other potential travel vaccines in development and is also
developing an investigational vaccine against the West Nile virus, which has
spread to 48 US States in the last six years.

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.





Holding in Company

Cambridge, UK and Cambridge, Massachusetts - 20 October 2005 - Acambis plc
("Acambis") (LSE: ACM, NASDAQ: ACAM) announces an interest in its shares by The
Goldman Sachs Group, Inc.

On 19 October 2005, Acambis received notification that, as of the close of
business on 17 October 2005, following a purchase of shares, The Goldman Sachs
Group, Inc., ("GS Inc") of 85 Broad Street, New York, NY 10004, USA, was
interested in a total of 4,312,161 ordinary shares of 10p each, representing a
4.02% holding of Acambis' issued share capital.

Of these 4,312,161 shares:

a)   the interest in 258,315 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 1,136,200 shares arose from an interest held by GS&Co, 
     acting as custodian of 568,100 American Depositary Receipts ("ADRs"); these
     ADRs are, or will be, held at The Depositary Trust Company, New York;

c)   the interest in 47,630 shares arose from the interest held by GS&Co., a 
     direct subsidiary of GS Inc, acting as discretionary manager. These shares 
     are, or will be, registered in the name of GSSN; and

d)   the interest in 2,870,016 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 is establishing a travel vaccines
franchise through its US-based subsidiary Berna Products Corporation, which
markets Vivotif(R), the world's only licensed oral typhoid vaccine, in North
America. Acambis has other potential travel vaccines in development and is also
developing an investigational vaccine against the West Nile virus, which has
spread to 48 US States in the last six years.

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 the 2004 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 October, 2005                       ACAMBIS PLC





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