Two major resignations from the Cabinet over Brexit herald a worrying moment or two for Prime Minister Theresa May.

Boris Johnson announced his resignation at lunchtime today, just hours after the Brexit Secretary David Davis fell on his sword over the apparent agreement made by the Cabinet over the coming UK position on Brexit for negotiations with the EU.

Davis, who had been a prominent “Brexiteer” during the referendum campaign, was concerned that the “current trend of policy and tactics” could mean that it was “less and less likely” that the UK would leave the European Customs Union and Single Market.

Johnson’s departure suggests real splits between the ‘Brexiteers’ and Remainers in the Cabinet. Once more, the loss of the two senior Tories suggests a weakening of May’s authority in the government and a potential leadership election – and possibly a general election – in the coming weeks and months.