Notification of Shareholding

10 Jun 2011 07:00

Embargoed for release: 0700 on 10 June 2011

Northern Petroleum Plc ("Northern" or "the Company") Notification of Shareholding

TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES

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

Northern Petroleum Plc

2. Reason for the notification (please place an X inside the appropriate bracket/s):

An acquisition or disposal of voting rights: ( X )

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: ( X )

Other (please specify): ( )

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

The Royal Bank of Scotland Group plc

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

The Royal Bank of Scotland N.V.

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

08/06/2011

6. Date on which issuer notified:

09/06/2011

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

5%8. Notified details:……………..

A: Voting rights attached to shares

Class/type of shares if Situation previous to the Triggering transaction possible using the ISIN CODE Number of shares Number of voting Rights GB00B0D47T64 4,646,313 4,646,313

Resulting situation after the triggering transaction

Class/type of Number of shares Number of voting rights % of voting rightsshares if possible using the ISIN CODE Direct Direct Indirect Direct Indirect GB00B0D47T64 4,678,372 4,678,372 0 5.02 0.00

B: Financial Instruments

Resulting situation after the triggering transaction

Type of Expiration Date Exercise/ Number of voting % of voting financial Conversion Period rights that may be rights instrument / Date acquired if the instrument is exercised/ converted. Total (A+B)Number of voting % of voting rights rights 5.02 4,678,372

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

The Royal Bank of Scotland Group plc

RFS Holdings B.V.

RBS Holdings N.V.

The Royal Bank of Scotland N.V.

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:

This Notification is based upon the Voting Rights figure of 93,068,160 obtained from your Regulatory Announcement dated 31st March 2011.

14. Contact name:

Chris Foss, Director of Finance, Legal & Corporate Affairs

15. Contact telephone number:020 7469 2900 ---ENDS--- Notes to Editors:

For further information on Northern visit www.northpet.com.