FORM 6-K
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Special Report of Foreign Issuer
Pursuant to Rule 13a - 16 or 15d - 16 of
The Securities and Exchange Act of 1934
For the date of October 19, 2007
SIGNET GROUP plc
(Translation of registrant's name into English)
15 Golden Square
London W1F 9JG
England
(Address of principal executive office)
Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40F.
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-
TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES 1. Identity of the issuer or the underlying issuer of existing Signet Group plc shares to which voting rights are attached: 2. Reason for the notification (please tick the appropriate box or boxes): An acquisition or disposal of voting rights An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached An event changing the breakdown of voting rights x 3. Full name of person(s) subject to the notification BT Pension Scheme Trustees Limited as obligation: trustee of the BT Pension Scheme. See Section 9 for further information 4. Full name of shareholder(s) (if different from 3.) N/A 5. Date of the transaction and date on which the threshold is 17 October 2007 crossed or reached: 6. Date on which issuer notified: 18 October 2007 7. Threshold(s) that is/are crossed or reached: 3% 8. Notified details: A: Voting rights attached to shares Class/type of Situation previous to the Resulting situation after the triggering transaction shares Triggering transaction Number of Number of Number of shares Number of voting % of voting rights if possible Shares Voting rights ix using the ISIN Rights viii Direct Indirect Direct x Indirect Direct Indirect CODE xi B1HTFP6 69,831,494 69,831,494 67,159,513 0% 3.938% GB00B1HTFP68 ORD US$0.009 B: Financial Instruments Resulting situation after the triggering transaction xii Type of financial Expiration date Exercise/ Conversion Number of voting rights % of voting instrument xiii Period/ Date xiv that may be acquired if rights the instrument is exercised/ converted. Total (A+B) Number of voting rights % of voting rights 67,159,513 3.938% 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: BT Pension Scheme Trustees Limited is the parent undertaking of Britel Fund Trustees Limited, which is the parent undertaking of Hermes Pensions Management Limited. Hermes Pensions Management Limited is the parent undertaking of: 1.Hermes Investment Management Limited (voting rights held in this issuer: 0.182%).. 2.Hermes Focus Asset Management Limited (voting rights held in this issuer: 3.529%) 3.Hermes Equity Ownership Services limited (voting rights held in this issuer: 0.226%) 4.Hermes Assured Limited (included with number 1.) Please see Section 13 for further information. Proxy Voting: 10. Name of the proxy holder: See Comment in Section 13. 11. Number of voting rights proxy holder will cease to hold: See Comment in Section 13. 12. Date on which proxy holder will cease to hold voting rights: See Comment in Section 13. 13. Additional information: Hermes Equity Ownership Services Limited hold the voting rights under a standing proxy contained in services agreements for the provision of corporate governance services to various underlying clients. Hermes Investment Management Limited hold the voting rights under a standing proxy contained in investment management agreements with various underlying clients, which includes all the shares owned directly by BT Pension Scheme Hermes Focus Asset Management Limited hold the voting rights as General Partner under a standing proxy contained in limited partnership agreements with various limited partnerships. All voting rights held on behalf of the above entities are aggregated for the purposes of DTR 5.2.1(a). The aggregation is made at the lower threshold of 3% and above because Hermes Equity Ownership Services Limited does not manage investments for the purposes of the investment manager exemption contained in DTR 5.1.5. This disclosure is made by BT Pension Scheme Trustees Limited, which is the ultimate parent undertaking for the purposes of DTR 5.2.1(e). 14. Contact name: Margaret Moss/Valerie Davidson 15. Contact telephone number: 020 7680 2125/ 020 7680 2177 ANNEX NOTIFICATION OF MAJOR INTERESTS IN SHARES XVI A: Identity of the person or legal entity subject to the notification obligation Full name (including legal form for legal BT Pension Scheme Trustees Limited as entities) trustee of the BT Pension Scheme and Hermes Pensions Management Limited Contact address (registered office for Lloyds Chambers, 1 Portsoken Street, legal entities) London E1 8HZ Phone number 020 7702 0888 Other useful information (at least legal BT Pension Scheme Trustees Limited is representative for legal persons) the parent undertaking of the group of companies subject to the notification obligation as indirect holders of voting rights for the purpose of DTR 5.2.1(a) and 5.2.1(e). Identity of the notifier Full name: Mark Andrew Jenkins - Group Company Secretary Contact address: Signet Group plc, 15 Golden Square, London, W1F 9JG Phone number: 0870 90 90 301
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
SIGNET
GROUP plc
By: /s/
Walker Boyd
Name: Walker
Boyd
Title:
Group Finance Director
Date: October 19, 2007