Holding(s) in Company

For filings with the FSA include the annex

For filings with the issuer exclude the annex

TR-1: Notification of Major Interests in Shares

Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

Scottish and Southern Energy plc

2. Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

An event changing the breakdown of voting rights

Other (please specify):

3. Full name of person(s) subject to the notification obligation:

Capital Research and Management Company

4. Full name of shareholder(s) (if different from 3.):

5. Date of the transaction and date on which the threshold is crossed or reached:

26 October 2009

6. Date on which the issuer notified:

27 October 2009

7. Threshold(s) that is/are crossed or reached:

Above 5%

 8. Notified details:

A: Voting rights attached to shares

Class/type of shares

If possible using the ISIN CODE

Situation previous to the Triggering transaction

Resulting situation after the triggering transaction

Number of shares

Number of voting rights

Number of shares

Number of voting rights

% of voting rights

Direct

Indirect

Direct

Indirect

Direct

Indirect

Ordinary

GB0007908733

45,787,405

45,787,405

46,267,405

46,267,405

5.0173%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/Conversion Period

Number of voting rights that may be acquired if the instrument is exercised/converted

% of voting rights

n/a

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Exercise price

Expiration date

Exercise/ Conversion period xviii

Number of voting rights instrument refers to

% of voting rights

n/a

Nominal

Delta

Total (A+B+C)

Number of voting rights

% of voting rights

46,267,405

5.0173%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable:

Proxy Voting:

10. Name of the proxy holder:

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

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

13. Additional information:

14. Contact Name:

15. Contact telephone number:

Annex Notification of Major Interests in Shares

A: Identity of the person or legal entity subject to the notification obligation

Full name (including legal form for legal entities)

Capital Research and Management Company

Contact address (registered office for legal entities)

333 South Hope Street, 55th Floor

Los Angeles, California 90071

Phone number & email

(213) 615-0469

[email protected]

Other useful information (at least legal representative for legal persons)

B: Identity of the notifier, if applicable

Full name

Gina Martinez

Contact address

333 South Hope Street, 55th Floor

Los Angeles, California 90071

Phone number

(213) 615-0469

Other useful information (e.g. functional relationship with the person or legal entity subject to the notification obligation)

Fax: (213) 486-9698

C: Additional Information

Commencing 20 January 2007, The Capital Group Companies, Inc., no longer reports ownership of securities. Capital Group International, Inc. and Capital Research and Management Company now report relevant holdings separately for the purposes of the new DTR Handbook.