RNS Number:1399R
Colt Telecom Group PLC
21 October 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:
   2% Senior Convertible Notes due 2005 and 2006

3. Period of Return:
   From: 14 April 2003 to 21 October 2003

4. Number and class of share(s) (amount of stock/debt security) not
   issued under scheme:
   23,083,311

5. Number of Shares issued/allotted under scheme during period:
   Nil

6. Balance under scheme not yet issued/allotted at end of period:
   23,083,311

7. Number and class of share(s) (amount of stock/debt securities)
   originally listed and the date of admission:
   35,646,824 Ordinary Shares of 2.5p each listed on 22 October 1999

Please confirm total number of shares in issue at the end of the period in order
for us to update our records.
1,508,927,811

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




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

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