Sirius Minerals Regulatory News (SXX)

For immediate release: 0700hrs, Monday 18 APRIL 2011

Sirius Minerals Plc

("Sirius" or the "Company")

Director and Company Secretary Appointments

The Directors of Sirius Minerals Plc (AIM: SXX, OTCQX: SRUXY), the globally diversified potash development group, are pleased to announce the appointment of Mr Peter Woods as a Non-Executive Director of the Company and of Jas Sembi as Company Secretary, both with immediate effect.

Peter John Esdaile Woods, 73, is a consulting geologist and engineer with extensive experience in the potash industry having worked for 13 years as Chief Geologist at the Boulby Potash Mine in North Yorkshire, initially on its development and start-up of. Since leaving Boulby, Peter has consulted to a number of potash companies and projects including Selection Trust on the Red Sea potash project in Saudi Arabia and for two years on the Environmental Protection Scheme for the ASEAN potash project in Thailand. In addition he has reviewed potash projects in Spain and Russia. He has been advising York Potash Ltd since its establishment and has continued to do so following its acquisition by Sirius in January this year.

In addition to Peter's potash knowledge he has the valuable experience of serving as one of the Secretary of State's Appointees on the North York Moors National Park Planning Committee from 1996 to 1999. He has also become a widely involved member of the North Yorkshire community having lived in the area on and off for over 40 years.

Chris Fraser, Managing Director and CEO of Sirius, said: "Having now worked closely with Peter for over a year on the creation and evaluation of the York Potash Project, I can without doubt say he will bring irreplaceable experience in both potash and the local environment to our company. As well as being a talented geologist, Peter also has a passion for the environment. He will bring to the Board of Sirius his valuable perspectives on sustainable development and those of someone living in the local community. I know Peter will make a great contribution to building Sirius into the New Potash Powerhouse."

Mr Woods currently holds 4,199,916 ordinary shares of the Company, equivalent to 0.4% of the issued share capital of the Company.

There is no further information on Mr Woods required to be disclosed under Schedule Two, paragraph (g) (i)-(viii) of the AIM Rules for Companies.

Jas Sembi joins the Company as Company Secretary replacing London Registrars plc who step down from this position, which they have held since July 2009.

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.

information on the Company can be found at www.siriusminerals.com.