Theresa May has resigned, effective 7 Jun. (She will then retain the position until a successor is chosen, which could take as long as six weeks.) This has seemed inevitable ever since she took the position, with every event making it seem more and more impossible to avoid. It has seemed particularly certain since her announcement of a revised Withdrawal Agreement bill that included support for a Parliamentary vote on a second referendum, prompting Andrea Leadsom’s resignation from her position as Leader of the House. Her chosen date is notable: it ensures that she beats Gordon Brown’s tenure.
While the results of European Parliamentary elections have not yet been published, it’s possible that May has seen that the Tories have lost seats. If so, this could have combined with poor Tory showings in local elections at the beginning of the month to demonstrate — if not to May herself, then to others in her party able to pressure her — that the party is in need of new leadership.
May’s resignation has prompted responses from many politcians attempting to both support the fallen leader while clarifying that they, of course, have nothing to do with her. Boris Johnson, who seems most likely to become Prime Minister, thanked May for her “stoical service” before immediately transitioning to a statement that it’s time to get on with it, and promising that, if selected, he will deliver Brexit on 31 Oct regardless of whether or not a deal is in place. (Of course, this is what May said about 29 Mar.) European leaders, similarly, have expressed their respect for May before getting to the point: Britain really needs to clarify its plans.
May will remain an MP.