RNS Number:4311M
Colt Telecom Group PLC
17 June 2003


                                   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 December 2003 to 17 June 2003

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:

Nil

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 Ordinary Shares of 2.5p each listed on 18 June 1997

Please confirm total number of shares in issue at the end of the period in order
for us to update our records.

1,507,538,535

Contact for queries:

Name:  Mark A. Jenkins

Telephone: 0207 390 3676

Address: COLT Telecom Group plc
         Beaufort House
         15 St. Botolph Street
         London EC3A 7QN

Person making return:

Name:  Mark A. Jenkins, Company Secretary





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