Sirius Minerals' new Woodsmith polyhalite mine in the North York Moors has caused issues for investors with the potential for increased costs and an extended deadline.

The Telegraph states that "Sirius said the cost of digging the mile-deep mine would rise by $400m-$600m (£309m-£464m), on top of the previously estimated $3bn it still needs to raise in debt funding."

The company's shares due to the announcement, however have regained ground since.