Holding(s) in Company

Scottish & Southern Energy PLC 21 September 2004 NOTIFICATION UNDER SECTION 198 TO 202 OF THE COMPANIES ACT 1985 The Company was notified on 20 September 2004 that Barclays plc, through various legal entities as listed below, has a notifiable interest in 26,292,551 ordinary 50p shares in Scottish and Southern Energy plc, being 3.06% of the issued share capital of the company. Legal Entity Barclays Global Investors Australia Ltd 202,475 Barclays Bank Trust Company Ltd 27,066 Barclays Private Bank and Trust Ltd 450 Barclays Life Assurance Co Ltd 1,098,328 Barclays Global Investors, N.A. 7,528,599 Barclays Private Bank Ltd 66,424 Barclays Global Investors Japan Trust & Banking 899,003 Barclays Private Bank and Trust Ltd 10,925 Barclays Global Investors Japan Ltd 180,065 Gerrard Ltd 1,528,544 Barclays Global Investors Ltd 13,199,658 Barclays Capital Securities Ltd 149,588 Barclays Global Fund Advisors 1,401,426 Group Holding 26,292,551 Registered Holder Bank of Ireland 153,530 BARCLAYS CAPITAL NOMINEES LIMITED 149,588 Barclays Trust Co & Others 2,671 Barclays Trust Co DMC69 16,605 Barclays Trust Co R69 7,790 CHASE NOMINEES LTD 470,582 CHASE NOMINEES LTD 4,227,357 CHASE NOMINEES LTD 273,474 Clydesdale Nominees HGB0125 2,920 Clydesdale Nominees HGB0125 1,640 Clydesdale Nominees HGB0125 4,230 Clydesdale Nominees HGB0125 1,135 Clydesdale Nominees HGB0125 1,000 INVESTORS BANK AND TRUST CO. 1,231,084 INVESTORS BANK AND TRUST CO 4,077,097 INVESTORS BANK AND TRUST CO 61,796 INVESTORS BANK AND TRUST CO 204,659 INVESTORS BANK AND TRUST CO 114,570 INVESTORS BANK AND TRUST CO 188,862 INVESTORS BANK AND TRUST CO 10,785 INVESTORS BANK AND TRUST CO 386,829 INVESTORS BANK AND TRUST CO 133,168 INVESTORS BANK AND TRUST CO 9,937 INVESTORS BANK AND TRUST CO 140,065 INVESTORS BANK AND TRUST CO 23,626 INVESTORS BANK AND TRUST CO 10,006 INVESTORS BANK AND TRUST CO 204,546 INVESTORS BANK AND TRUST CO 1,023,183 JP MORGAN (BGI CUSTODY) 218,089 JP MORGAN (BGI CUSTODY) 55,586 JP MORGAN (BGI CUSTODY) 74,084 JP MORGAN (BGI CUSTODY) 580,544 JP MORGAN (BGI CUSTODY) 104,488 JP MORGAN (BGI CUSTODY) 17,998 JP MORGAN (BGI CUSTODY) 33,435 JP MORGAN (BGI CUSTODY) 7,779,716 JP MORGAN (BGI CUSTODY) 14,104 JP MORGAN (BGI CUSTODY) 448,529 JPMORGAN CHASE BANK 25,709 JP Morgan Chase Bank 3,371 JP Morgan Chase Bank 36,775 JP Morgan Chase Bank 15,311 JP Morgan Chase Bank 103,160 JP Morgan Chase Bank 413,352 JP Morgan Chase Bank 7,168 JP Morgan Chase Bank 104,042 JP Morgan Chase Bank 23,337 JP Morgan Chase Bank 25,025 JP Morgan Chase Bank 61,938 JP Morgan Chase Bank 8,727 JP Morgan Chase Bank 9,213 JP Morgan Chase Bank 90,955 JPMORGAN CHASE BANK 71,832 JPMORGAN CHASE BANK 130,643 Mellon Trust - Boston & SF 141,547 Mitsubishi Trust International 5,010 NORTHERN TRUST BANK - BGI SEPA 5,387 NORTHERN TRUST BANK - BGI SEPA 23,066 NORTHERN TRUST BANK - BGI SEPA 33,155 R C Greig Nominees Limited a/c 331,508 R C Greig Nominees Limited a/c 167,415 R C Greig Nominees Limited GP1 748,494 R C Greig Nominees Limited SA1 281,127 State Street 18,154 STATE STREET BOSTON 806,784 STATE STREET BOSTON 74,164 Swan Nominees Limited 450 ZEBAN NOMINEES LIMITED 66,424 TOTAL 26,292,551 This information is provided by RNS The company news service from the London Stock Exchange

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