Sirius Minerals has been undermined by concerns about approval of its proposed potash project in North Yorkshire, sending its shares down almost 11%.
A recommendation from a local planning committee on the proposal to mine polyhalite, a form of potash, on the North York National Park is due by the end of this week with a vote set to take place next week.
But a report by consultant Amec is contains a number of negative views on the project, although Sirius said it was "a subjective opinion" and it was preparing a detailed response.
But the company's shares have fallen 3p to 24.5p on the uncertainty. SP Angel analysts said:
With concerns still being voiced by the National Park, definite approval by the end of the week looks like quite a challenge.
