RNS Number:5200U
Colt Telecom Group PLC
22 January 2004



                                 UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                            Washington, D.C.  20549

                                    FORM 15

 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(G) OF
THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER
          SECTION 13 AND 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934.


                                                 Commission File Number: 0-28970

                             COLT TELECOM GROUP plc
             (Exact name of registrant as specified in its charter)

        Beaufort House, 15 St. Botolph Street, London EC3A 7QN, England
  (Address, including zip code, and telephone number, including area code, of
                   registrant's principal executive offices)

                       12% Senior Discount Notes due 2006
            (Title of each class of securities covered by this Form)

  American Depositary Shares, representing the right to receive four Ordinary
                        Shares, nominal value 2.5p each
                    Ordinary Shares, nominal value 2.5p each
         Warrants to purchase Ordinary Shares, nominal value 2.5p each
                      2% Senior Convertible Notes due 2005
  (Titles of all other classes of securities for which a duty to file reports
                     under section 13(a) or 15(d) remains)

Please place an X in the box(es) to designate, the appropriate rule provision(s)
  relied upon  to terminate or suspend the duty to file reports:


Rule 12g-4(a)(1)(i)         X       Rule 12h-3(b)(1)(i)                 X
                           ---                                         ---
                           ---                                         ---
Rule 12g-4(a)(1)(ii)                Rule 12h-3(b)(1)(ii)
                           ---                                         ---
                           ---                                         ---
Rule 12g-4(a)(2)(i)                 Rule 12h-3(b)(2)(i)
                           ---                                         ---
                           ---                                         ---
Rule 12g-4(a)(2)(ii)                Rule 12h-3(b)(2)(ii)
                           ---                                         ---
                                                                       ---
                                    Rule 15d-6
                                                                       ---


Approximate number of holders of record as of the certification or notice date:
0

Pursuant to the requirements of the Securities Exchange Act of 1934, COLT
Telecom Group plc has caused this certification/notice to be signed on its
behalf by the undersigned duly authorized  person.


Date: 20th January 2004                        By:    Mark A. Jenkins
                                                      Director Legal Services







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