The call from a supervisor came to the steel shop floor in Sheffield, England, on Thursday afternoon: The tariffs were off. “Everything had changed for us,” said Richard Bott, as he stood near stacks of steel slabs still radiating waves of heat from the mill. In a trade deal with Britain announced with much fanfare on Thursday, President Trump agreed to lift the 25 percent tariffs on steel that had posed a dire threat to Britain’s struggling industry and to Mr. Bott’s employer, Marcegaglia Stainless Sheffield. The cavernous plant is one of the last remaining large steel-making facilities in a city that since the 18th century was a hub of innovation in the industry.
