Key Conservative players instrumental to the campaign to leave the European Union praised her. "Theresa May won," Environment Secretary Michael Gove told BBC radio. "She's got a deal in the interests of the whole U.K. She's confounded her critics." Trade Secretary Liam Fox said it was "great news."

Boris Johnson, who has caused the premier no end of headaches in the past, congratulated her on Twitter for "her determination in getting today's deal" while making clear what he expects: "We now aim to forge a deep and special partnership with our European friends and allies while remaining true to the referendum result - taking back control of our laws, money and borders for the whole of the UK."