More ministers have quit the British government, piling pressure on embattled Prime Minister Theresa May.

Britain's Prime Minister Theresa May delivers a speech outside 10 Downing Street in London, Wednesday, Nov. 14, 2018. (Photo: AP)

Junior Brexit Minister Suella Braverman and Anne-Marie Trevelyan, a junior education minister, have quit. They follow Brexit Secretary Dominic Raab and Work and Pensions Secretary Esther McVey.

All are staunch supporters of Brexit and say the deal agreed between Britain and the bloc does not deliver the firm break with the EU that voters chose in a 2016 referendum.

May says the deal honors the referendum result while also maintaining close ties with the EU, Britain's main trading partner. But her ability to get it through Parliament — and to remain as prime minister — are now in doubt.