Rule 8.3 - BRITISH ENERGY GROUP

FORM 8.3 DEALINGS BY PERSONS WITH INTERESTS IN SECURITIES REPRESENTING 1% OR MORE (Rule 8.3 of the City Code on Takeovers and Mergers) 1. KEY INFORMATION Name of person dealing BARCLAYS PLC (Note 1) Company dealt in BRITISH ENERGY GROUP Class of relevant security ORD GBP0.10 to which the dealings being disclosed relate (Note 2) 08 October 2008 2. INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE (a) Interests and short positions (following dealing) in the class of relevant security dealt in (Note 3) Long Short Number (%) Number (%) (1) Relevant 40,616,554 3.93% 559,907 0.05% securities (2) Derivatives 733,337 0.07% 645,327 0.06% (other than options) (3) Options and 0 0.00% 0 0.00% agreements to purchase/sell Total 41,349,891 4.00% 1,205,234 0.12% (b) Interests and short positions in relevant securities of the company, other than the class dealt in (Note 3) Class of Long Short relevant security: Number (%) Number (%) (1) Relevant securities (2) Derivatives (other than options) (3) Options and agreements to purchase/sell Total (c) Rights to subscribe (Note 3) Class of relevant security: Details 3. DEALINGS (Note 4) (a) Purchases and sales Purchase/sale Number of Securities Price per unit (GBP) Purchase 45,615 7.2000 Purchase 1,716 7.2000 Purchase 17,160 7.3950 Purchase 50,000 7.4750 Purchase 2,574 7.2000 Purchase 1,348 7.2000 Purchase 9,945 7.3516 Purchase 82,431 7.3897 Purchase 21,450 7.2000 Purchase 1,937 7.3900 Purchase 17,181 7.3950 Purchase 189,563 7.3782 Purchase 51,894 7.2000 Purchase 100 7.3000 Purchase 12,341 7.3753 Purchase 15,444 7.2000 Sale 2,400 7.4150 Sale 19,994 7.2870 Sale 1,900 7.3391 Sale 2,934 7.2000 Sale 242,973 7.3436 Sale 100 7.3000 Sale 17,160 7.4320 Sale 21 7.3000 Sale 17,181 7.3950 Sale 702 7.3889 Sale 12,361 7.3649 Sale 90,854 7.3845 (b) Derivatives transactions (other than options) Product name, Long/Short Number of Price per (e.g. CFD) (Note 6) Securities unit (GBP) CFD Long 100 7.3 CFD Long 1900 7.3391 CFD Long 242973 7.3435 CFD Long 12361 7.3649 CFD Long 90854 7.3845 CFD Long 702 7.3888 CFD Long 2400 7.415 CFD Short 100 7.3 CFD Short 12341 7.3753 CFD Short 189563 7.3782 CFD Short 82431 7.3897 CFD Short 1937 7.39 (c) Options transactions in respect of existing securities (i) Writing, selling, purchasing or varying Product name, Writing, Number of Exercise Type, e.g. Expiry Option money e.g. call selling, securities to price American, date paid/received option purchasing, which the option European etc. per unit (GBP) varying etc. relates (GBP) (ii) Exercising Product name, e.g. Number of Exercise price per call option securities unit (Note 5) (d) Other dealings (including new securities) (Note 4) Nature of transaction Details Price per unit (Note 8) (if applicable) (Note 5) 4. OTHER INFORMATION None Agreements, arrangements or understandings relating to options or derivatives Full details of any agreement, arrangement or understanding between the person disclosing and any other person relating to the voting rights of any relevant securities under any option referred to on this form or relating to the voting rights or future acquisition or disposal of any relevant securities to which any derivative referred to on this form is referenced. If none, this should be stated. Is a Supplemental Form 8 attached? (Note 9) NO Date of disclosure 09 October 2008 Contact name Geoff Smith Telephone number 020 7116 2913 If a connected EFM, name of offeree/offeror with which connected If a connected EFM, state nature of connection (Note 10) Notes The Notes on Form 8.3 can be viewed on the Takeover Panel's website at www.thetakeoverpanel.org.uk

Companies

Barclays (BARC)
UK 100

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