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) 29 September 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 40,572,116 3.92% 390,080 0.04% securities (2) Derivatives 557,343 0.05% 483,408 0.05% (other than options) (3) Options and 0 0.00% 0 0.00% agreements to purchase/sell Total 41,129,459 3.98% 873,488 0.08% (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 27,300 7.5453 Purchase 76,131 7.5605 Purchase 17,842 7.5579 Purchase 8,240 7.5461 Purchase 600 7.5533 Purchase 42,951 7.5600 Purchase 100,000 7.5450 Purchase 42,951 7.5600 Purchase 1,236 7.5200 Purchase 21,476 7.5600 Purchase 1,651 7.5200 Purchase 1,212 7.5200 Purchase 12,748 7.5950 Purchase 30,030 7.5200 Purchase 6,006 7.5200 Purchase 685 7.5447 Sale 12,748 7.5950 Sale 600 7.5533 Sale 18,135 7.5472 Sale 165,371 7.5522 (b) Derivatives transactions (other than options) Product name, Long/Short Number of Price per (e.g. CFD) (Note 6) Securities unit (GBP) CFD Long 18135 7.5471 CFD Long 165371 7.5522 CFD Long 600 7.5533 CFD Short 6393 7.52 CFD Short 27300 7.5452 CFD Short 8240 7.5461 CFD Short 600 7.5533 CFD Short 17842 7.5578 CFD Short 76131 7.5605 (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 30 September 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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