Total Voting Rights

For immediate release: 31 March 2011

Sirius Minerals Plc

("Sirius" or the "Company")

Total Voting Rights

For the purposes of the Disclosure and Transparency Rules of the Financial Services Authority, the Board of Sirius Minerals Plc (the "Company") is required to notify the market of the following:

As at the date of this announcement, the Company's issued share capital consists of 1,032,577,755 ordinary shares with a nominal value of 0.25 p each, with voting rights ("Ordinary Shares"). The Company does not hold any Ordinary Shares in Treasury.

Therefore the total number of Ordinary Shares in the Company with voting rights is 1,032,577,755.

The above figure of 1,032,577,755 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.

For further information, please visit the Company's website www.siriusminerals.com. Alternatively please contact:

About Sirius Minerals Plc

Sirius Minerals is a globally diversified potash development company. Its primary focus is to bring on stream major potash mining facilities through the acquisition and development of projects overlying recognised potash deposits. Today it holds properties in the United Kingdom (North Yorkshire), the United States (North Dakota), and Australia (Queensland and Western Australia).

The Company is additionally progressing ongoing Research and Development initiatives into the secondary uses of salt and potash beds for energy storage and carbon dioxide sequestration.

Incorporated in 2003, Sirius Minerals' shares are traded on the London Stock Exchange's AIM market. Its shares are also traded in the United States on the OTCQX through the use of a sponsored ADR facility. Further information on the Company can be found at www.siriusminerals.com.