COLT Telecom Group Blocklisting Interim Review -- 2% Senior Convertible Notes due 2005 and 2006

LONDON, UNITED KINGDOM


LONDON, June 5, 2003 (PRIMEZONE) -- COLT Telecom Group plc (COLT) (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: 22 October 2002 to 13 April 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.

1,507,536,535

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