Sirius Minerals Regulatory News (SXX)

05 November 2018

Sirius Minerals Plc

Teesside port construction contract signed

§ Port handling facility EPC contract signed with McLaughlin & Harvey

§ Contract price in line with capital re-estimate announced on 6 September 2018

§ Procurement of the major construction packages for stage 2 financing near completion with only the MTS fit-out package outstanding

Sirius Minerals Plc ("Sirius" or the "Company") announces that its subsidiary York Potash Processing and Ports Ltd and McLaughlin & Harvey Ltd ("McLaughlin & Harvey") have entered into an engineering, procurement and construction contract for the development of the Company's port handling facility at Teesside (the "Contract").

The Contract scope comprises the design and build of works associated with the port handling facilities including; product storage facilities for approximately 250,000 tonnes of product, ship loading equipment, ship outload infrastructure, and the final product screening facility. The Contract price, which will be incurred in GBP and EUR, is on a lump sum basis and is in line with the Company's capital re-estimate announced on 6 September 2018. The proposed schedule for the works fits within the Company's overall Project schedule.

The Company's stage 2 financing related procurement programme is nearing completion for the major construction packages with only the mineral transport system ("MTS") fit-out scope remaining. The Company has identified STRABAG as its preferred contractor for the MTS fit-out and is in the final stages of negotiation for this scope of work.

Chris Fraser, Managing Director and CEO of Sirius, comments:

"We are pleased to have entered into another significant construction contract for the ongoing construction of our world leading polyhalite project. In 18 months we have made great progress and are now nearing the completion of the procurement programme to support our stage 2 financing process.

"The construction of our port infrastructure is another example of the level of investment and skilled job creation we are delivering in both Teesside and the UK as we develop a project that has the potential to make the UK a world leader in the fertilizer industry."

Ben Houchen, Mayor of the Tees Valley, comments:

"I am delighted to see yet another step forward for Sirius Minerals' nationally significant project. The level of commitment to Teesside from this project is huge as it will continue to generate jobs for local people and help expand our global reputation. The successful development of the Sirius project will see over £400 million invested in Teesside and will importantly see the regeneration of the former Redcar steelworks port frontage. We expect many more regeneration projects will be announced on the South Tees Development Corporation site very soon."

Port handling facility

The port handling facility will receive the Company's polyhalite fertilizer after it has been transported from the Woodsmith mine site via the 37km underground mineral transport system and processed into the finished product, POLY4, at the Wilton Materials Handling Facility. At peak production the Company expects to export 20 million tonnes per annum of POLY4 to markets all over the world. Offtake agreements have already been signed with customers on four continents for 8.2 million tonnes per annum in peak aggregate volumes of POLY4.

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About McLaughlin & Harvey Ltd

McLaughlin & Harvey are a building, civil engineering, and facilities management contractor undertaking work throughout the United Kingdom and Ireland. McLaughlin & Harvey is one of the UK's leading Civil Engineering contractors and offers design and construct services across a range of disciplines including port and harbour developments. McLaughlin & Harvey has developed a reputation for delivering safe, innovative and high quality, sustainable marine projects, striving for completion on time and to budget. With over 100 years' experience in the design and build of new ports and working within existing live commercial harbours, McLaughlin & Harvey has amassed considerable experience in the delivery of challenging maritime project encompassing all aspects of marine engineering. Further information can be found at www.mclh.co.uk.

About Sirius Minerals Plc

Sirius Minerals Plc is focussed on the development of the Woodsmith Mine, which will access the world's largest and highest grade polyhalite deposit located in North Yorkshire, United Kingdom. Polyhalite is a unique multi-nutrient fertilizer, which can be used to increase balanced fertilization around the world. Sirius Minerals' shares are traded on the Premium List of the London Stock Exchange. Its shares are also traded in the United States on the OTCQX through a sponsored ADR facility. Further information on the Company can be found at www.siriusminerals.com.