Keir Starmer, the British prime minister, is facing increasing pressure to set a date for his departure after elections across much of the country resulted in massive losses for his ruling Labour party. With the bulk of results now counted after voting on Thursday, Labour had lost more than 1,400 representatives from English councils, the local government structures that deliver many neighbourhood services. Starmer’s party also crashed to defeat in the election for the devolved parliament of Wales , where it had dominated the country’s politics for a century, and went backwards in representation in the Scottish parliament . Adding to the panic in Labour, the party lost to a series of challengers, including the righting populist Reform UK party, the leftwing Greens, and pro-independence nationalists in Wales and Scotland.…