FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of May 2005 COLT TELECOM GROUP plc (Translation of Registrant's Name into English) Beaufort House 15 St. Botolph Street London EC3A 7QN England _________________________________ (Address of Principal Executive Offices) (Indicate by check mark whether the Registrant files or will file annual reports under cover of Form 20-F or Form 40-F.) Form 20-F..X... Form 40-F..... (Indicate by check mark whether the Registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934) Yes ..... No ..X... (If "Yes" is marked, indicate below the file number assigned to the Registrant in connection with Rule 12g3-2(b): 82- ________) This Form 6-K shall be deemed to be incorporated by reference in the Registrant's Registration Statement on Form F-3 (Reg. No.333-05972), in the Registrant's Registration Statement on Form S-8 (Reg. No.333-8362) 18 May 2005 COLT TELECOM GROUP PLC - QUARTERLY SEGMENTAL INFORMATION FOR 2004 The results of COLT Telecom Group plc (COLT) for the first quarter of 2005 were reported under IFRS. In that announcement, for comparative purposes, COLT restated its segmental information for the quarters ended 31 March and 31 December 2004 and for the year ended 31 December 2004 to conform to IFRS and to reflect the new COLT geographic organisation. COLT is today providing the equivalent restatement for the quarters ended 30 June and 30 September 2004. This information is published solely to assist shareholders and commentators to prepare for the publication of COLT's remaining 2005 quarterly results and will not be expanded or commented on until the appropriate results are published. Segmental information The Group operates in a single business segment, telecommunications, and in the geographical areas shown below. The reported segments have been changed from those previously reported as a result of the reorganisation which COLT announced in late 2004. The new segments are Germany, UK, France and Strategic Markets. Strategic Markets comprises Austria, Belgium, Denmark, Ireland, Italy, The Netherlands, Portugal, Spain, Sweden and Switzerland. Switched turnover comprises services that involve the transmission of voice, data or video through a switching centre. Non-switched turnover includes managed and non-managed network services, and bandwidth services. For the three months ended 31 March 2004, 30 June 2004, 30 September 2004 and 31 December 2004 and twelve months ended 31 December 2004, turnover and result by segment were as follows: Three months ended 31 March 2004 Germany UK France Strategic Total Markets GBP'000 GBP'000 GBP'000 GBP'000 GBP'000 Carrier 30,158 8,001 2,225 23,355 63,739 Non-carrier 53,463 29,391 17,533 23,226 123,613 Total switched 83,621 37,392 19,758 46,581 187,352 Non-switched 32,956 28,555 17,296 36,046 114,853 Other -- 89 -- 562 651 Turnover by segment 116,577 66,036 37,054 83,189 302,856 Operating result by segment (1,137) (364) 865 (5,871) (6,507) Three months ended 30 June 2004 Germany UK France Strategic Total Markets GBP'000 GBP'000 GBP'000 GBP'000 GBP'000 Carrier 30,853 7,698 2,950 27,219 68,720 Non-carrier 51,963 27,459 15,578 24,002 119,002 Total switched 82,816 35,157 18,528 51,221 187,722 Non-switched 31,880 28,915 16,617 37,712 115,124 Other -- 4 -- 34 38 Turnover by segment 114,696 64,076 35,145 88,967 302,884 Operating result by segment (6,436) (4,329) (100) (1,904) (12,769) Three months ended 30 September 2004 Germany UK France Strategic Total Markets GBP'000 GBP'000 GBP'000 GBP'000 GBP'000 Carrier 31,195 7,270 2,965 26,264 67,694 Non-carrier 53,961 25,032 14,745 23,381 117,119 Total switched 85,156 32,302 17,710 49,645 184,813 Non-switched 32,967 27,764 17,916 39,278 117,925 Other 1,117 -- -- 710 1,827 Turnover by segment 119,240 60,066 35,626 89,633 304,565 Operating result by segment (7,952) (6,928) (959) (3,874) (19,713) Three months ended 31 December 2004 Germany UK France Strategic Total Markets GBP'000 GBP'000 GBP'000 GBP'000 GBP'000 Carrier 29,499 7,298 3,916 23,225 63,938 Non-carrier 60,241 21,137 16,287 25,613 123,278 Total switched 89,740 28,435 20,203 48,838 187,216 Non-switched 34,487 28,111 18,465 39,503 120,566 Other 195 -- -- 365 560 Turnover by segment 124,422 56,546 38,668 88,706 308,342 Operating result by segment (7,444) (6,848) (2,889) (8,082) (25,263) Twelve months ended 31 December 2004 Germany UK France Strategic Total Markets GBP'000 GBP'000 GBP'000 GBP'000 GBP'000 Carrier 121,705 30,267 12,056 100,063 264,091 Non-carrier 219,628 103,019 64,143 96,222 483,012 Total switched 341,333 133,286 76,199 196,285 747,103 Non-switched 132,290 113,345 70,294 152,539 468,468 Other 1,312 93 -- 1,671 3,076 Turnover by segment 474,935 246,724 146,493 350,495 1,218,647 Operating result by segment (22,969) (18,469) (3,083) (19,731) (64,252) Enquiries: COLT Telecom Group plc Luke Glass Director Corporate Communications Email: luke.glass@colt.net Tel: +44 (0) 20 7390 3681 Gill Maclean Head of Corporate Communications Email: gill.maclean@colt.net Tel: +44 (0) 20 7863 5314 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Current Report on Form-6K to be signed on its behalf by undersigned, thereunto duly authorized. Date: 18 May 2005 COLT Telecom Group plc By: ___Jane Forrest___ Jane Forrest Company Secretary