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 December 02 2005 BRITISH ENERGY GROUP PLC (Registrant's name) Systems House Alba Campus Livingston EH54 7EG (Address of principal executive offices) Indicate by check mark whether the registrant files or will file annual reports under cover 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): Exhibit Index The following document (bearing the exhibit number listed below) is furnished herewith and is made a part of this Report pursuant to the General Instructions for Form 6-K: Exhibit Description No. 1 RNS Announcement, re: 'Holding(s) in Company' dated 02 December 2005 2 December 2005 British Energy Group plc NOTIFICATIONS UNDER SECTIONS 198 TO 202 - UK COMPANIES ACT British Energy Group plc has received notification from Fidelity Investments of the following: 1. Company in which shares are held: British Energy Group plc 2. Notifiable interest: Ordinary Shares (A) FMR Corp. 82 Devonshire Street Boston, MA 02109 Parent holding company of Fidelity Management & Research Company (FMRCO), investment manager for US mutual funds, and Fidelity Management Trust Company (FMTC), a US state chartered bank which acts as a trustee or investment manager of various pension and trust accounts. (See Schedule A for listing of Registered Shareholders and their holdings). (B) Fidelity International Limited (FIL) P.O. Box HM 670 Hamilton HMCX, Bermuda Parent holding company for various direct and indirect subsidiaries, including Fidelity Investment Services Ltd. (FISL) and Fidelity Gestion (FIGEST), Fidelity Investments Advisory (Korea) Limited (FIA(K)L), Fidelity Investments Management (Hong Kong) Limited (FIMHK), Fidelity Pension Management (FPM), Fidelity Investments Japan (FIJ) and Fidelity Investments International (FII), investment managers for various non-US investment companies and institutional clients. 3. The notifiable interests also comprise the notifiable interest of: Mr. Edward C. Johnson 3d 82 Devonshire Street Boston, MA 02109 A principal shareholder of Fidelity International Limited. 4. The notifiable interests include interest held on behalf of authorised unit trust schemes in the UK, notwithstanding the exemption from reporting pursuant to Section 209 (1)(h) of the Companies Act 1985. 5. These notifications of disclosable interests constitute separate notifications of interest in the shares and are combined solely for the purposes of clarity and efficiency. Nothing herein should be taken to indicate that Fidelity International Limited and its direct and indirect subsidiaries or Mr Edward C Johnson 3d act as a group or in concert in respect of the disclosed interests, or that they are required to submit these notifications on a joint basis. 6. The disclosable interests arise under section 208 (4) (b) of the Act, namely where a person, not being the registered holder, is entitled to exercise a right conferred by the holding of the shares or to control the exercise of such rights, or under section 203 of the Act respectively. Schedule A Security: British Energy Group plc Current ownership percentage 6.39% Total Shares Held 35,841,501 Shares in issue: 561,016,515 Change in holdings since last filing +7,528,361 Ordinary shares SHARES MANAGEMENT NOMINEE/REGISTERED NAME HELD COMPANY 43,200 N/A N/A 2,786,000 FPM Northern Trust London 1,568,900 FPM Bank of New York Brussels 1,508,000 FPM State Str Bk And Tr Lndn (S) 1,105,200 FPM JP Morgan, Bournemouth 894,300 FPM Mellon Bank 625,900 FPM HSBC Bank PLC 219,400 FPM Bankers Trust London 100,800 FPM Midland Securities Services 72,800 FPM Clydesdale Bank PLC 3,159,860 FMRCO JP Morgan Chase Bank 274,800 FMRCO Mellon Bank NA 16,991,031 FISL JP Morgan, Bournemouth 2,278,740 FIL Brown Bros Harrimn Ltd LUX 375,600 FIL HSBC Bank PLC 353,700 FIL JP Morgan Bournemouth 236,800 FIL Bank of New York Brussels 205,550 FIL BNP Paribas Paris (C) 130,800 FIL Northern Trust London 42,600 FIL BNP Paribas Paris (C) 64,300 FIJ Brown Brothers Harriman & Co 1,589,000 FII Bank of New York Europe Ldn 721,420 FII JP Morgan Bournemouth 305,200 FIGEST BNP Paribas, Paris 187,600 FIGEST CDC Finance 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. Date: December 02 2005 BRITISH ENERGY GROUP PLC By:____John Searles____ Name: John Searles Title: Director - Investor Relations