TMX group

LONDON, UNITED KINGDOM -- Heritage Oil Plc (TSX:HOC)(LSE:HOIL)

TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARESⁱ

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

Heritage Oil Plc

2. Reason for the notification:

A change in the issuer's total voting rights

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

Capital Research and Management Company

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

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

23 June 2011

6. Date on which issuer notified:

24 June 2011

7. Threshold(s) that is/are crossed or reached:^{vi, vii}

Above 11%

8. Notified details:

A: Voting rights attached to sharesviii,ix
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 rightsx
			Indirect	Directxi	Indirectxii	Direct	Indirect
JE00B2Q4TN56	30,929,327	30,929,327	30,929,327		30,929,327		11.0997%

B: Financial Instruments
Resulting situation after the triggering transaction
Type of financial instrument	Expiration date xiii	Exercise/ Conversion Period/ Date xiv	Number of voting rights that may be acquired if the instrument is exercised/ converted.	% of voting rights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv,xvi
Resulting situation after the triggering transaction
Type of financial instrument	Exercise price	Expiration date xvii	Exercise/ Conversion period xviii	Number of voting rights instrument refers to	% of voting rights xix,xx
					Nominal	Delta

Total (A+B+C)
Number of voting rights	% of voting rights
30,929,327	11.0997%

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

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: