(SXX.L) Sirius Exploration PLC Buy/Sell

For immediate release: 4 November 2009

Sirius Exploration PLC

("Sirius" or the "Company")

Issue of Equity in connection with increasing stake in AusPotash Corporation

Further to the announcement made on 29 September 2009, Sirius (AIM: SXX, OTC: SRUXY) announces that it has today completed the purchase of a further 105,595 common shares of AusPotash (the "Transaction"), representing 0.18% per cent of the issued and outstanding common shares of AusPotash at a price of CAD$0.40 per AusPotash share purchased. As a result of the Transaction Sirius now has an interest in 63.68% of AusPotash. Sirius has issued 211,190 new Ordinary Shares at a price of 11.25p per share in consideration for the Transaction. Further to the Transaction and the announcement of 29 September 2009, 19,135,996 common shares of AusPotash remain to be purchased by Sirius and the Company will notify the market when these are completed in due course.

Accordingly, 211,190 new Ordinary Shares of 0.25p per share ("Ordinary Shares") have been issued and allotted and trading in such shares is expected to commence on 10 November 2009.

Following the issue of the new Ordinary Shares as set out above, the total number of shares in issue will be 606,941,340.