SOURCE: COLT Telecom Group plc

June 20, 2005 08:30 ET

COLT Telecom Group plc - Blocklisting Interim Review

London -- (MARKET WIRE) -- June 20, 2005 --

                            SCHEDULE 5


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  19.12.2004  to   18.06.2005

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

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

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

 7.  Number and class of share(s) (amount of stock/debt              9,796,800
     securities) originally listed and the date of admission;       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 1,511,186,506

Contact for queries:                       Address: Beaufort House
Name: Caroline Griffin Pain                15 St. Botolph Street
Telephone: 020 7947 1677                   London EC3A 7QN

Person making return
Name: Caroline Griffin Pain

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