Downing Street is trying to ignore the challenge from a former minister, but it has raised eyebrows around Westminster.

Even the prime minister's most loyal ministers are pushing him to change, writes Laura Kuenssberg.

Keir Starmer set to face challenge as former minister says she will trigger race if no cabinet minister comes forward

Catherine West tells the BBC if a leadership hopeful does not put themselves forward she will try to trigger a contest.

Downing Street is trying to ignore the challenge from a former minister, but it has raised eyebrows around Westminster.

Sir Keir Starmer is facing increasing calls to resign over Labour’s election losses

Sir Keir Starmer has vowed to fight on despite growing calls for him stand down from his own MPs and the threat of a leadership contest.

The embattled PM will seek to persuade his MPs not to ditch him as Labour leader in a speech on Monday.

PM is determined to fight on in No 10 but various contenders to replace him have been organising for some time

Prime minister will say ‘incremental change won’t cut it’ as he tries to convince Labour MPs to back him after Thursday’s election losses

PM makes series of policy pledges including seeking new deal with EU and says he will fight any challenge

Backbench MP calls prime minister’s speech ‘too little, too late’ but stops short of moving to stand against him herself

Editorial: After disastrous elections, Labour MPs voice public doubts over whether the prime minister can politically survive at all

A growing number of Labour MPs are in no mood to heed calls from the PM’s allies to keep faith with their leader

Analysts have slashed the odds of Starmer facing a leadership challenge by September.

The prime minister is fighting to stay on in No 10 as heavy election losses trigger a Labour revolt.

Prime minister says process for challenging a leader has not been triggered and Labour should get on with governing

Supporters of PM say it shows he has majority support after more than 80 MPs call on him to quit

Andy Burnham, Angela Rayner and Wes Streeting are all potential candidates for the top job.

Tepid cabinet support and a blunted No 10 operation are making it harder for the prime minister to face down critics

Downing Street insiders suggest health secretary does not yet have the support for a leadership push