COLT Telecom Group plc Announces Block Listing Six Monthly Return


LONDON, June 24, 2004 (PRIMEZONE) --


                            SCHEDULE 5

                  BLOCK LISTING SIX MONTHLY RETURN


 To:  Listing Applications
      UK Listing Authority
      Financial Services Authority
      25, The North Colonnade
      Canary Wharf
      London, E14 5HS


         Please ensure the entries on this return are typed


 1.  Name of company  COLT Telecom Group plc

 2.  Name of scheme   COLT Telecom Group Warrants

 3.  Period of return:    From  18.12.2003  to   18.06.2004

 4.  Number and class of share(s) (amount of stock/debt security)
     not issued under scheme     606,999

 5.  Number of shares issued/allotted under scheme during
     period:    0

 6.  Balance under scheme not yet issued/allotted at end of
     period     606,999

 7.  Number and class of share(s) (amount of stock/debt
     securities) originally listed and the date of admission;
              9,796,800            18.06.1997


 Please confirm total number of shares in issue at the end of the
 period in order for us to update our records  1,510,866,212


 Person making return
 Name: Adrian Goodenough
 Position:
 Signature:

                 This information is provided by RNS
       The company news service from the London Stock Exchange

-0-
Contact for queries:                     Address: Beaufort House
Name: Adrian Goodenough                  15 St. Botolph Street
Telephone: 020 7947 1677                 London EC3A 7QN