Sir Keir Starmer is fighting to stay on as prime minister, as he stares down calls from Labour critics for him to leave Downing Street.

Supporters of Health Secretary Wes Streeting have told the BBC they expect him to launch a leadership challenge against the prime minister as soon as Thursday.

Earlier in the week four members of the government, including health minister - and Streeting ally - Zubir Ahmed resigned, whilst scores of Labour MPs are calling for Sir Keir to quit following a disastrous set of elections for the party last week.

Here is a summary of what is happening.

Sign up for our Politics Essential newsletter to keep up with the inner workings of Westminster and beyond.

Rayner stood down as deputy prime minister in September 2025 after admitting underpaying stamp duty.

Sir Keir Starmer and his backers argue a leadership contest would paralyse the government for months.

BBC chief political correspondent Henry Zeffman explains what this could mean for a potential Labour leadership contest.

Health Secretary Wes Streeting is thought to be plotting a Labour leadership challenge as early as Thursday.

BBC correspondents look at some of the new bills Sir Keir Starmer's government wants to pass.