COLT Telecom Group plc: Blocklisting Interim Review


LONDON, Oct. 21, 2003 (PRIMEZONE) -- COLT Telecom Group plc (Nasdaq:COLT) (LSE:CTM):

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

Person making return

Name: Mark A. Jenkins, Company Secretary

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



 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