Shares in the Aim-listed firm went up by 10.71 per cent after the company updated investors on the approvals process for the project.
Planning officers at the North York Moors National Park Authority have told Sirius they are likely to leave the decision on the planning considerations up to members of the Authority.
The National Park group will be presented with a report on the proposed potash project at a special planning committee meeting on 30 June.
Chris Fraser, Sirius chief executive, said the firm has confidence in “the strength of our planning case, the huge levels of support for the application and the many wide-ranging economic benefits that the project will deliver to the local area”.
Paul Smith, analyst at WH Ireland, said this was a “positive outcome” and added: “The planning officers can find no reason to recommend a rejection of Sirius’ proposal.”