SOURCE: COLT Telecom Group plc

April 18, 2005 10:59 ET

Colt Telecom Group plc announces Blocklisting Interim Review

London -- (MARKET WIRE) -- April 18, 2005 --

                              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 Share Plan

 3.  Period of return:  From  15.10.2004  to   14.04.2005

 4.  Number and class of share(s) 
     (amount of stock/debt security) not issued under scheme  1,914,221

 5.  Number of shares issued/allotted under scheme during 
     period:                                                  101,000

 6.  Balance under scheme not yet issued/allotted at end of   1,813,221
     period

 7.  Number and class of share(s) (amount of stock/debt       8,500,000
     securities) originally listed and the date of admission; 14.04.2000


Please confirm total number of shares in issue at the end of the period
in order for us to update our records  1,511,151,331


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
Position:  company secretary
Signature: Caroline Griffin Pain


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