Placing and Total Voting Rights

For immediate release: 17 September 2010

Sirius Exploration Plc

("Sirius" or the "Company")

Placing and Total Voting Rights

The Directors of Sirius Exploration Plc (AIM: SXX, OTC: SRUXY), the potash mining group, are pleased to announce that the Company has placed 50,000,000 New Ordinary Shares of 0.25 pence to raise approximately £3,000,000. The Placing was arranged by the Company with offshore investors and existing shareholders at an issue price of 6p per New Ordinary Share.

Application will be made for the New Ordinary Shares, which will when issued rank pari passu with the existing Ordinary Shares in issue, to be admitted to trading on AIM; trading is expected to commence on 23 September 2010. Following the issue of the new Ordinary Shares as set out above, the total number of shares in issue will be 715,300,160. Therefore the total number of Ordinary Shares in the Company with voting rights is 715,300,160.

The above figure of 715,300,160 Ordinary Shares may be used by shareholders in the Company as the denominator for the calculation by which they will determine if they are required to notify their interest in, or a change to their interest in, the share capital of the Company under the Financial Service Authority's Disclosure and Transparency Rules.

Chris Catlow commented:

"We are delighted to be broadening our shareholder base through this placement which allows us to progress our activities in Australia and fund the first phase of our exploratory drilling program in North America. It comes at a time when we are making strong progress with our potash projects in both regions."

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