Holding(s) in Company

Scottish & Southern Energy PLC
24 August 2006


Scottish and Southern Energy plc


Holding(s) in Company


23 August 2006



NOTIFICATION UNDER SECTION 198 TO 202 OF THE COMPANIES ACT 1985


The Company was notified on 23 August 2006 that Barclays plc, through various
legal entities as listed below, has a notifiable interest in 34,584,936 ordinary
50p shares in Scottish and Southern Energy plc, being 4.02% of the issued share
capital of the company.

Legal Entity                                            Holding  Percentage Held

Barclays Capital Securities Ltd                    11,996,996           1.3946
Barclays Life Assurance Co Ltd                      1,116,772           0.1298
Barclays Private Bank and Trust Ltd                    13,378           0.0016
Barclays Global Fund Advisors                       2,730,494           0.3174
Barclays Global Investors, N.A.                     6,108,198           0.7101
Gerrard Ltd                                         3,237,478           0.3763
Barclays Global Investors Japan Ltd                    94,266           0.0110
Barclays Global Investors Canada Ltd                   60,670           0.0071
Barclays Capital Inc                                  240,800           0.0280
Barclays Bank Trust Company Ltd                        39,481           0.0046
Barclays Private Bank and Trust Ltd                       540           0.0001
Barclays Global Investors Australia Ltd                76,234           0.0089
Barclays Global Investors Ltd                       7,898,632           0.9182
Barclays Global Investors Japan Trust & Banking       970,997           0.1129

Group Holding                                      34,584,936           4.0206

Registered Holder                                      Account          Holding
                                                   Designation

BANK OF IRELAND                                       426353          172,985
BANK OF IRELAND                                       426360           20,045
BANK OF NEW YORK                                                       61,032
BARCLAYS CAPITAL NOMINEES LIMITED                                     608,987
BARCLAYS CAPITAL NOMINEES LIMITED                                  11,369,209
BARCLAYS CAPITAL NOMINEES LIMITED                                     222,000
Barclays Capital Securities Ltd.                                       18,800
Barclays Capital Securities Ltd.                                       18,800
Barclays Global Investors Canada                                       60,670
Barclays Trust Co & Others                                              1,946
BARCLAYS TRUST CO AS EXEC/ADM                                             750
Barclays Trust Co DMC69                                                13,400
Barclays Trust Co R69                                                  23,385
CHASE NOMINEES LTD                                     16376          417,756
CHASE NOMINEES LTD                                     21359           76,461
CHASE NOMINEES LTD                                     28270          281,182
Clydesdale Nominees HGB0125                         63919101            1,270
Clydesdale Nominees HGB0125                         68640801            4,230
Clydesdale Nominees HGB0125                         69451601            6,660
Clydesdale Nominees HGB0125                       2500054901            1,218
Gerrard Nominees Limited                              605704              360
Gerrard Nominees Limited                              607486              750
Gerrard Nominees Limited                              617906              400
Gerrard Nominees Limited                              622124            1,500
Gerrard Nominees Limited                              635860            1,750
Gerrard Nominees Limited                              637739              450
Gerrard Nominees Limited                              643975            2,700
Gerrard Nominees Limited                              647291              875
Gerrard Nominees Limited                              658574            1,250
Gerrard Nominees Limited                              660968            1,500
Gerrard Nominees Limited                              777546              200
Greig Middleton Nominees Limited (GM1)                                154,711
Greig Middleton Nominees Ltd (GM3)            220805DN                 22,258
Greig Middleton Nominees Ltd (GM3)            523475DN                 75,000
INVESTORS BANK AND TRUST CO.                                           13,473
INVESTORS BANK AND TRUST CO.                                           79,630
INVESTORS BANK AND TRUST CO.                                          146,421
INVESTORS BANK AND TRUST CO.                                        4,165,951
INVESTORS BANK AND TRUST CO.                                          105,259
INVESTORS BANK AND TRUST CO.                                            6,787
INVESTORS BANK AND TRUST CO.                                          879,141
INVESTORS BANK AND TRUST CO.                                          141,673
INVESTORS BANK AND TRUST CO.                                          207,765
INVESTORS BANK AND TRUST CO.                                           24,329
INVESTORS BANK AND TRUST CO.                                           57,376
INVESTORS BANK AND TRUST CO.                                        2,178,000
INVESTORS BANK AND TRUST CO.                                          263,024
JP MORGAN (BGI CUSTODY)                                16331          193,323
JP MORGAN (BGI CUSTODY)                                16338           51,273
JP MORGAN (BGI CUSTODY)                                16341          467,472
JP MORGAN (BGI CUSTODY)                                16342          108,806
JP MORGAN (BGI CUSTODY)                                16400        6,553,998
JP MORGAN (BGI CUSTODY)                                17011           14,716
JP MORGAN (BGI CUSTODY)                                18409          657,387
JPMORGAN CHASE BANK                                                    28,123
JPMORGAN CHASE BANK                                                    76,234
JPMorgan Chase Bank                                                    92,307
JPMorgan Chase Bank                                                   468,601
JPMorgan Chase Bank                                                   116,362
JPMorgan Chase Bank                                                    43,618
JPMorgan Chase Bank                                                     8,213
JPMorgan Chase Bank                                                     7,168
JPMorgan Chase Bank                                                   124,843
JPMorgan Chase Bank                                                    86,285
JPMorgan Chase Bank                                                    23,600
JPMorgan Chase Bank                                                     9,408
JPMorgan Chase Bank                                                     8,479
JPMorgan Chase Bank                                                    52,587
Mellon Trust - US CUSTODIAN /                                          34,536
Mitsui Asset                                                           14,582
R C Greig Nominees Limited                                          2,083,139
R C Greig Nominees Limited a/c AK1                                    507,027
R C Greig Nominees Limited a/c BL1                                     87,058
R C Greig Nominees Limited a/c CM1                                     49,053
R C Greig Nominees Limited GP1                                        168,007
R C Greig Nominees Limited SA1                                         79,490
Reflex Nominees Limited                                                   540
STATE STREET BOSTON                                                   446,172
Trust & Custody Services Bank                                             522
Trust & Custody Services Bank                                           8,688

                                      Total                        34,584,936




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