Sir Keir Starmer has said he is "seriously considering" running for Labour Party leader.
The shadow Brexit secretary, who is pro-Remain, has been widely tipped to throw his hat in the ring after the party suffered its worst general election result since 1935.
In an interview with The Guardian, he revealed his interest in becoming Jeremy Corbyn's successor.
"The case for a bold and radical Labour government is as strong now as it was last Thursday. We need to anchor ourselves in that," he told the paper.
"I want trust to be restored in the Labour party as a progressive force for good: and that means we have to win. But there's no victory without values."
He added: "I don't think anybody would call me a Corbynista, but I'm a socialist."
Labour peer Lord Andrew Adonis told talkRADIO Sir Keir would have his backing if he proceeded to enter the leadership race.
"He is clearly the most credible candidate to be Prime Minister on the Labour side," he said.
"He'll find his own style, his own policy mix and so on, but he has the first great requirement for being Prime Minister which is that he's trusted on the doorstep."
The process to replace Mr Corbyn is expected to commence on January 7, with a view to having a new leader in place by the end of March.
Shadow chancellor John McDonnell has said the next leader should be a woman, and gave his backing to shadow business secretary, Rebecca Long-Bailey.
Labour MP for Aberavon, Stephen Kinnock, said the fact that there had never been a female Labour leader was an "albatross hanging round our necks".
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