Holding(s) in Company

Scottish & Southern Energy PLC
15 February 2007



TR-1(i): notification of major interests in shares


1. Identity of the issuer or                   Scottish & Southern Energy Plc
the underlying 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                                          

--------------------------------------------                                      -------

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                                     

--------------------------------------------                                      -------


3. Full name of person(s)                      Legal & General Group Plc (L&G)
subject to the notification                         --------------------
obligation(1):


-------------------------------
4. Full name of shareholder(s)  Legal & General Assurance (Pensions Management) Limited (PMC)
(if different from 3.)(1):                          --------------------

-------------------------------
5. Date of the transaction and                               n/a
date on which the threshold is                      --------------------
crossed or reached(1):
-------------------------------
6. Date on which issuer                                   14/02/07
notified:                                           --------------------
-------------------------------
7. Threshold(s) that is/are                            Above 3% (L&G)
crossed or reached:                                 --------------------
-------------------------------




8. Notified details:

A: Voting rights attached to shares
Class/   Situation previous  Resulting situation after the triggering transaction
type of  to the Triggering   (1)
shares   transaction (1)
if
possible Number Number of    Number of     Number of voting       % of voting
using    of     Voting       shares        rights ix              rights
the ISIN Shares Rights viii
CODE                          Direct        Direct x    Indirect Direct  Indirect
                                                         xi
GBP Ord  27,299,985 3.17%     30,928,844    30,928,844           3.58%

0.50
         (Under S-198 on 28/01/03)



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



Total (A+B)

Number of voting rights                   % of voting rights

30,928,844                                3.58%





9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable xv:
Legal & General Group Plc (Direct and Indirect)
(Group)

Legal & General Investment Management (Holdings)


Limited (LGIMH) (Direct and Indirect)


Legal & General Investment Management Limited
(Indirect) (LGIM)


  Legal & General Group Plc (Direct) (L&G) (30,928,844 - 3.58% = LGAS, LGPL &
                                     PMC)


Legal & General Investment Management    Legal & General Insurance Holdings
(Holdings) Limited (Direct) (LGIMHD)     Limited (Direct) (LGIH)
(26,379,142 - 3.06% = PMC)


Legal & General Assurance (Pensions      Legal & General Assurance Society
Management) Limited (PMC) (26,379,142 -  Limited (LGAS & LGPL)
3.06% = PMC)


                                         Legal & General Pensions Limited
                                         (Direct) (LGPL)


Proxy Voting:

10. Name of the proxy holder:                                               N/A


11. Number of voting rights proxy holder will cease to hold:                N/A


12. Date on which proxy holder will cease to hold voting rights:            N/A


13. Additional information:  Using the total voting rights figure of 861,888,563
                                   First notification under DTR Sourcebook


14. Contact name:                                Helen Lewis


15. Contact telephone
number:                                         020 7528 6742


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.




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