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SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549



(Amendment No. 4 to)

SCHEDULE TO

(Rule 14d-100)

TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1)
OF THE SECURITIES EXCHANGE ACT OF 1934

Oxford GlycoSciences Plc
(Name of Subject Company (Issuer))

Celltech Group plc
(Name of Filing Person (Offeror))

American Depositary Shares
Ordinary Shares of 5 pence sterling each

(Title of Class of Securities)

691464101 (American Depositary Shares)
(CUSIP Number of Class of Securities)

John Slater
Celltech Group plc
208 Bath Road
Slough
Berkshire SL13WE
United Kingdom
Tel: 011 44 1753 534 655

(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications on Behalf of Filing Person)

WITH A COPY TO:
Bart Capeci, Esq.
Allen & Overy
One New Change
EC4M 9QQ
London, United Kingdom
Tel: 011 44 207 330 2401
Fax: 011 44 207 330 9999

CALCULATION OF FILING FEE

     

Transaction Valuation(1)   Amount of Filing Fee(1)(2)
$161,249,195.24   $13,045.06

(1)For purposes of calculating the filing fee pursuant to Rule 0-11(d), the
transaction value of the OGS shares and OGS ADSs (each OGS ADS
represents one OGS share) to be received by Purchaser, assuming acceptance
of the Offer by holders in the United States, is calculated as follows: 56,082,073
OGS shares (including OGS shares represented by OGS ADSs) multiplied
by 182 pence per OGS share, the cash consideration being offered per OGS
share, which yields (Pounds) 102,069,372.86, converted at the exchange rate on February 27, 2003, of
(Pounds)1=$1.5798, which yields $161,249,195.24.

(2)Sent by wire transfer to the SEC on March 3, 2003.

         
  [  ]   Check the box if any part of the fee is offset as provided by Rule 0-11 (a) (2) and identify the filing with which the offsetting fee was previously paid. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

 


 

         
Amount Previously Paid:        Filing Party:      
 
   
Form or Registration No.:         Date Field:      
 
   

   
[  ] Check the box if the filing relates solely to preliminary communications made before commencement of a tender offer.
     
Check the appropriate boxes below to designate any transactions to which the statement relates:
[ X]   third-party tender offer subject to Rule 14d-1.
[   ]   issuer tender offer subject to Rule 13e-4.
[   ]   going-private transaction subject to Rule 13e-3.
[   ]   amendment to Schedule 13D under Rule 13d-2.
Check the following box if the filing is a final amendment reporting the results of the tender offer. [   ]


 

     This Amendment No. 4 amends the Tender Offer Statement on Schedule TO initially filed on March 3, 2003, by Celltech Group plc, a company organized under the laws of England and Wales (the “Offeror”), relating to the third-party tender offer by the Offeror to purchase all of the (i) ordinary shares of 5 pence each of OGS (“OGS Shares”) and (ii) American Depositary Shares, each representing one OGS Share (“OGS ADSs”) and evidenced by American Depositary Receipts (“OGS ADRs”).

     On April 1, 2003, the Offeror issued a press release related to the third-party tender offer by the Offeror. A copy of the press release is attached hereto as Exhibit (12)(a).

     The item numbers and responses thereto below are in accordance with the requirements of the Schedule TO.

ITEM 4. TERMS OF THE TRANSACTION.

     Item 4 of the Schedule TO and Appendix V — “Additional Information” of the Offer Document are hereby amended and supplemented by inserting the following information as the final paragraph in paragraph 2(a)(i) — “Directors and Executive Officers of Celltech and Directors of OGS — Directors” as follows:

Philip Rogerson
Non-Executive Director. Mr. Rogerson joined the Celltech Board in March 2003 as a Non-Executive Director. He is Chairman of Aggreko plc and Viridian Group plc and serves as Chairman or Non-Executive Director of a number of other UK public companies. Mr. Rogerson has held numerous directorships with other UK public companies during the last five years.

 


 

ITEM 12. EXHIBITS

     
EXHIBIT
NUMBER
  DOCUMENT
 
*(1) (a)   Offer Document dated March 1, 2003.
 
*(2) (a)   Letter of Transmittal.
 
*(3) (a)   Notice of Guaranteed Delivery.
 
*(4) (a)   Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.
 
*(5) (a)   Letter to Clients for use by Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.
 
*(6) (a)   Guidelines for Certification of Taxpayer Identification Number on Substitute Form W-9.
 
*(7) (a)   Form of Acceptance, Authority and Election.
 
*(8) (a)   Summary Advertisement in The Wall Street Journal, dated March 3, 2003.
 
*(9) (a)   Press release related to the third party tender offer by the Offeror dated March 14, 2003.
 
*(10) (a)   Press release related to the third party tender offer by the Offeror dated March 24, 2003.
 
*(11) (a)   Press release related to the third party tender offer by the Offeror dated March 26, 2003.
 
(12) (a)   Press release related to the third party tender offer by the Offeror dated April 1, 2003.

*Previously filed.

 


 

SIGNATURES

After due inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

   
  Celltech Group plc
 
  By:
 
  /s/  Peter Allen
....................................................
Peter Allen
Chief Financial Officer

Dated: April 1, 2003

 


 

INDEX TO EXHIBITS

     
Exhibit    
Number   Document

 
*(1)(a)   Offer Document dated March 1, 2003.
     
*(2)(a)   Letter of Transmittal.
     
*(3)(a)   Notice of Guaranteed Delivery.
     
*(4)(a)   Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.
     
*(5)(a)   Letter to Clients for use by Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.
     
*(6)(a)   Guidelines for Certification of Taxpayer Identification Number on Substitute Form W-9.
     
*(7)(a)   Form of Acceptance, Authority and Election.
     
*(8)(a)   Summary Advertisement in the Wall Street Journal dated March 3, 2003.
     
*(9)(a)   Press release related to the third party tender offer by the Offeror dated March 14, 2003.
     
*(10)(a)   Press release related to the third party tender offer by the Offeror dated March 24, 2003.
 
*(11) (a)   Press release related to the third party tender offer by the Offeror dated March 26, 2003.
 
(12) (a)   Press release related to the third party tender offer by the Offeror dated April 1, 2003.

*Previously filed.