Holding(s) in Company

Scottish & Southern Energy PLC
18 January 2007


Scottish and Southern Energy plc

Holding(s) in Company

18 January 2007

NOTIFICATION UNDER SECTION 198 TO 202 OF THE COMPANIES ACT 1985

The Company was notified on 18 January 2007 that Barclays plc, through various
legal entities as listed below, has a notifiable interest in 34,592,382 ordinary
50p shares in Scottish and Southern Energy plc, being 4.01% of the issued share
capital of the company.

Legal Entity                                          Holding  Percentage Held

Barclays Global Fund Advisors                       3,120,546           0.3621
Barclays Bank Trust Company Ltd                        39,122           0.0045
Gerrard Ltd                                         2,914,757           0.3382
Barclays Global Investors Ltd                      11,993,202           1.3915
Barclays Capital Securities Ltd                     2,396,716           0.2781
Barclays Global Investors Japan Ltd                    80,319           0.0093
Barclays Global Investors Japan Trust & Banking       977,767           0.1134
Barclays Private Bank and Trust Ltd                       540           0.0001
Barclays Private Bank and Trust Ltd                    12,331           0.0014
Barclays Global Investors, N.A.                    11,353,242           1.3173
Barclays Global Investors Canada Ltd                   67,275           0.0078
Barclays Capital Inc                                   59,000           0.0068
Barclays Life Assurance Co Ltd                      1,577,565           0.1830

Group Holding                                      34,592,382           4.0135


Registered Holder                         Account Designation          Holding

Bank of Ireland                                                        314,732
Bank of New York                                                        61,032
BBHISL Nominees Ltd HGB0125                          00063919101         1,270
BBHISL Nominees Ltd HGB0125                          00068640801         4,230
BBHISL Nominees Ltd HGB0125                          00069451601         6,660
BBHISL Nominees Ltd                                  00120199401           171
BNP PARIBAS                                                             62,807
Barclays Capital Nominees Ltd                                        1,527,496
Barclays Capital Nominees Ltd                                           59,000
Barclays Global Investors                                            9,357,926
Barclays Global Investors Canada                                        67,275
Barclays Trust Co & Others                                               3,054
Barclays Trust Co DMC69                                                 13,400
Barclays Trust Co E99                                                      343
Barclays Trust Co R69                                                   22,325
CIBC MELLON GLOBAL SECURITIES                                           44,023
Durlacher Nominees Ltd                                                 869,220
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           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 & Trust Company                                         100,614
Investors Bank and Trust Co.                                         3,120,546
JP Morgan (BGI CUSTODY)                                              1,577,565
JP Morgan (BGI CUSTODY)                                             11,678,470
JP Morgan Chase                                                        977,767
JP Morgan Chase                                                         57,146
JPMorgan Chase Bank                                                    468,762
Mellon Trust of New England                                             57,746
Mellon Trust - US Custodian / Trustee                                  157,156
Mitsui Asset Trust and Banking Company,
Limited                                                                 15,317
Mizuho Trust & Banking Co., Ltd                                          7,856
Northern Trust Bank - BGI Separate Fund
Custody                                                                265,462
R C Greig Nominees Limited                                           1,920,694
R C Greig Nominees Limited GP1                                         137,627
R C Greig Nominees Limited SA1                                          69,667
R C Greig Nominees Limited a/c AK1                                     450,757
R C Greig Nominees Limited a/c BL1                                      59,648
R C Greig Nominees Limited a/c CM1                                      36,444
Reflex Nominees Limited                                                    540
State Street Bank & Trust - Wire Bank -
ABA#026009                                                              44,452
State Street Bank and Trust Co                                          44,288
State Street Boston                                                    513,675
State Street Trust of Canada - Wire Bank - NO
ABA                                                                    102,559
The Northern Trust Company - U.S.
Custodian/Trustee                                                       72,740

                                      Total                         34,592,382








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