UNITE general secretary Sharon Graham warned today that she would “keep [Labour’s] feet to the fire” over its manifesto pledge to invest billions to save Britain’s struggling steel industry.

She was speaking on the BBC’s Sunday With Laura Kuenssberg after Business Secretary Jonathan Reynolds said “job guarantees” would be part of the negotiations between the government and steel giant Tata about its Port Talbot site in South Wales, where 2,800 jobs are under threat.

Ms Graham said Labour would have to borrow to invest in British industry — “we do not have time to wait for growth.”