Holding(s) in Company

Scottish & Southern Energy PLC 22 March 2007 TR-1(i): notification of major interests in shares 1. Identity of the issuer or the underlying Scottish & Southern Energy Plc issuer of existing shares to which voting -------------------- rights are attached(1): ------------------------------- 2. Reason for the notification (please tick the appropriate box or boxes): n/a see additional information ------- -------------------------------------------- An acquisition or disposal of voting rights X -------------------------------------------- ------- 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 -------------------------------------------- ------- Other (please specify) Compliance with Transparency Directive -------------------------------------------- ------- 3. Full name of person(s) subject to the Capital Group International, Inc notification obligation(1): -------------------- ------------------------------- 4. Full name of shareholder(s) (if different from 3.)(1): -------------------- ------------------------------- 5. Date of the transaction and date on which 20 March 2007 the threshold is crossed or reached(1): -------------------- ------------------------------- 6. Date on which issuer notified: 20 March 2007 ------------------------------- -------------------- 7. Threshold(s) that is/are crossed or reached: 4% ------------------------------- -------------------- 8. Notified details: A: Voting rights attached to shares Class/ Situation previous to Resulting situation after the triggering type of the Triggering transaction(1) shares transaction (1) if possible Number of Number of Number of Number of voting % of voting using Shares Voting shares rights ix rights the ISIN Rights Indirect Direct Indirect xi Direct Indirect CODE viii x Ordinary 34,235,203 3.9720 34,840,803 34,840,803 4.0423% Shares B: Financial Instruments Resulting situation after the triggering transaction xii Type of Expiration Exercise/ Number of voting rights that may % of financial date xiii Conversion be acquired if the instrument is voting instrument Period/ Date exercised/ converted. rights xiv N/A Total (A+B) Number of voting rights % of voting rights 34,840,803 4.0423% 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable xv: Proxy Voting: 9. Name of the proxy holder: 10. Number of voting rights proxy holder will cease to hold: 11. Date on which proxy holder will cease to hold voting rights: 12. Additional information: 13. Contact name: 14. Contact telephone number: Annex Notification of Major Interests in Shares A: Identity of the person or legal entity subject to the notification obligation Full name (including legal form for legal entities) Capital Group International, Inc Contact address (registered office for legal 11100 Santa Monica Blvd., entities) 15th Floor Los Angeles, California 90025 Phone number (213) 615-0469 Other useful information (at least legal representative for legal persons) B: Identity of the notifier, if applicable Full Name VivGina Martinez Contact address 11100 Santa Monica Blvd., 15th Floor Los Angeles, California 90025 Phone Number (213) 615-0469 Other useful information (e.g. functional relationship with Fax: (213) 486 - the person or legal entity subject to the notification 9698 obligation) Email: GRGroup@capgroup.com C: Additional Information Notes to the Forms -------------------------- (i) This form is to be sent to the issuer or underlying issuer and to be filed with the competent authority. This information is provided by RNS The company news service from the London Stock Exchange

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