Sirius Pet Regulatory News (SRSP)

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

Sirius Petroleum plc

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

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

Other (please specify): 

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

Ambeson Limited

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):

17/04/2009

6. Date on which issuer notified:

20/04/2009

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

10.0996% to 12.2664%

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

Direct

Indirect

Direct

Indirect

SEDOL 

B03VVN9

50,750,000

50,750,000

62,132,196

62,132,196

12.2664%

B: Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument 

Expiration date

Exercise/ Conversion Period/ Date

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

% of voting rights

Total (A+B)

Number of voting rights

% of voting rights

62,132,196

12.2664%

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

62,132,196 shares held with Brewin Nominees (Channel Islands) Limited

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:

David J H Dickens 

15. Contact telephone number:

00 971 4 351 1162

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

Full name (including legal form for legal entities)

Contact address (registered office for legal entities)

Phone number 

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

B:  Identity of the notifier, if applicable

Full name 

Contact address 

Phone number 

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

C: Additional information