PHILIP Hammond is being urged to get behind a fertiliser mine in Yorkshire which backers say could boost the UK economy by more than £2 billion a year. However, environmental campaigners have expressed concern about damage the project could do to the North York Moors National Park.

Sirius Minerals said a survey of the project by consultants Quod that it commissioned suggested the scheme to extract a natural fertiliser called polyhalite would bring annual GDP contributions of £2.3 billion for the next 50 years, and support more than 1,000 high quality jobs.