Notification of Shareholding

26th Aug 2011 09:17

For immediate release: 26 August 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 acquisition or disposal of instruments with similar economic effect to qualifying financial instruments: ( X )

An event changing the breakdown of voting rights: ( )

Other (please specify): ( )

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

BlackRock, Inc

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 if different):

24/08/2011

6. Date on which issuer notified:

25/08/2011

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

Holding has gone above 5% 8. Notified details:……………..

A: Voting rights attached to shares

Class/type of shares if possible Situation previous to the using the ISIN CODE Triggering transaction Number of Number of voting shares Rights GB00B0D47T64 N/A N/A

Resulting situation after the triggering transaction

Class/type of shares if possible Number of Number of voting % of voting using the ISIN CODE shares rights rights Direct Direct Indirect Direct Indirect GB00B0D47T64 N/A N/A 4,233,490 N/A 4.53

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of Expiration Exercise/ Number of voting rights that may be % of financial Date Conversion acquired if the instrument is voting instrument Period/ Date exercised/ converted. rights

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

Resulting situation after the triggering transaction

Type of Exercise Expiration Exercise/ Number of voting rights % of voting financial price date Conversion instrument refers to rights instrument period Nominal DeltaCFD 822,482 0.88% 0.88% Total (A+B+C)Number of voting % of voting rights rights 5,055,972 5.41

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

BlackRock Investment Management (UK) Limited - 5,055,972 (5.41%)

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:

Chris Foss, Director of Finance, Legal & Corporate Affairs

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

Comprehensive information on Northern and its oil and gas operations, including all press releases, annual reports and interim reports are available from Northern's website at www.northpet.com.

XLON

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Related Shares:

Cabot Energy