The MP tipped to challenge Jeremy Corbyn for the leadership if Labour had been destroyed in the election is now prepared to serve in his shadow cabinet, the Sunday Telegraph can reveal.

Yvette Cooper, who resigned from the front bench just days after Mr Corbyn won the leadership, would take up the position of shadow home secretary if it was offered it in a reshuffle.

It came as other leading critics including Angela Eagle and Chuka Umunna made it clear they were willing to make a return, despite public declarations of Mr Corbyn's unsuitability for the leadership.