British pound slides as U.K. threatens to quit Brexit talks The British pound slumped on Monday, after the U.K. hardened its Brexit rhetoric and polls showed support slipping for Prime Minister Theresa May in June elections. Sterling was changing hands at 1.2984 against the dollar, down 0.4% and off Friday’s almost seven-month peak of 1.3039 (GBP/USD). Brexit minister David Davis said on Sunday that Britain is prepared to walk away from divorce talks with the European Union without a deal if the bill for exiting the bloc exceeds 100 billion euros.