Holding(s) in Company

Scottish & Southern Energy PLC
07 December 2006


Scottish and Southern Energy plc


Holding(s) in Company


7 December 2006



NOTIFICATION UNDER SECTION 198 TO 202 OF THE COMPANIES ACT 1985


The Company was notified on 6 December 2006 that Barclays plc, through various
legal entities as listed below, has a notifiable interest in 26,112,522 ordinary
50p shares in Scottish and Southern Energy plc, being 3.03% of the issued share
capital of the company.

Legal Entity                                            Holding  Percentage Held

Barclays Capital Securities Ltd                     2,612,313           0.3036
Barclays Global Investors, N.A.                     6,684,021           0.7769
Barclays Bank Trust Company Ltd                        37,664           0.0044
Barclays Global Investors Australia Ltd               123,956           0.0144
Barclays Global Investors Japan Ltd                    85,065           0.0099
Barclays Private Bank and Trust Ltd                       540           0.0001
Barclays Global Investors Ltd                       7,901,431           0.9184
Barclays Global Investors Canada Ltd                   67,429           0.0078
Barclays Capital Inc                                  583,300           0.0678
Barclays Private Bank and Trust Ltd                    12,160           0.0014
Barclays Global Investors Japan Trust & Banking       987,973           0.1148
Barclays Global Fund Advisors                       2,910,231           0.3383
Gerrard Ltd                                         2,971,388           0.3454
Barclays Life Assurance Co Ltd                      1,135,051           0.1319

Group Holding                                      26,112,522           3.0351


Registered Holder                                       Account          Holding
                                                    Designation

BANK OF IRELAND                                        426353          234,119
BANK OF IRELAND                                        426360           22,534
BANK OF IRELAND                                        429079           86,440
BANK OF NEW YORK                                                        61,032
BNP PARIBAS                                                              7,635
BARCLAYS CAPITAL NOMINEES LIMITED                                      583,300
BARCLAYS CAPITAL NOMINEES LIMITED                                    2,276,047
Barclays Global Investors Canada                                        67,429
Barclays Trust Co & Others                                               1,939
Barclays Trust Co DMC69                                                 13,400
Barclays Trust Co R69                                                   22,325
CHASE NOMINEES LTD                                      16376          430,603
CHASE NOMINEES LTD                                      21359           93,873
CHASE NOMINEES LTD                                      28270          287,882
CIBC MELLON GLOBAL SECURITIES                                            5,114
Clydesdale Nominees HGB0125                       00063919101            1,270
Clydesdale Nominees HGB0125                       00068640801            4,230
Clydesdale Nominees HGB0125                       00069451601            6,660
Durlacher Nominees Limited                                             336,266
Gerrard Nominees Limited                               602394            1,600
Gerrard Nominees Limited                               607486              750
Gerrard Nominees Limited                               617906              400
Gerrard Nominees Limited                               622124            1,000
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)                                 131,187
Greig Middleton Nominees Ltd (GM3)                220805DN              22,258
Greig Middleton Nominees Ltd (GM3)                523475DN              75,000
INVESTORS BANK AND TRUST CO.                                         2,910,231
INVESTORS BANK AND TRUST CO.                                         6,029,057
JP MORGAN (BGI CUSTODY)                                 16331          202,193
JP MORGAN (BGI CUSTODY)                                 16338           49,924
JP MORGAN (BGI CUSTODY)                                 16341          467,336
JP MORGAN (BGI CUSTODY)                                 16342          113,000
JP MORGAN (BGI CUSTODY)                                 16400        6,238,235
JP MORGAN (BGI CUSTODY)                                 17011           14,716
JP MORGAN (BGI CUSTODY)                                 18409          795,627
JPMORGAN CHASE BANK                                                     28,329
JPMorgan Chase Bank                                                    123,956
JPMorgan Chase Bank                                                    987,973
JPMorgan Chase Bank                                                     57,917
Mellon Trust of New England                                              7,363
Mellon Trust- US Custodian/                                             44,188
Mitsui Asset                                                            15,110
Northern Trust Bank-BGI SEPA                                            35,061
R C Greig Nominees Limited                                           1,960,925
R C Greig Nominees Limited a/c AK1                                     458,161
R C Greig Nominees Limited a/c BL1                                      60,873
R C Greig Nominees Limited a/c CM1                                      38,812
R C Greig Nominees Limited GP1                                         141,625
R C Greig Nominees Limited SA1                                          70,072
Reflex Nominees Limited                                                    540
STATE STREET BANK AND TRUST-WI                                          20,824
STATE STREET BOSTON                                                    422,117
STATE STREET TRUST OF CANADA                                            14,289
The Northern Trust Company - U                                           9,012
Trust & Custody Services Bank                                           12,038
                                     Total                          26,112,522


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