Britain’s Observer newspaper said UK Prime Minister Keir Starmer was expected to resign on Monday and set out a timetable for his departure, though a government source said the leader remained focused on getting on with the job of governing. The threat to Starmer’s position, which has been building for months, increased sharply on Friday when his rival Andy Burnham won a seat in parliament that would allow him to launch a formal leadership challenge. The Observer report said Starmer was...