The Prime Minister has a new mantra, Newsnight learns, asserting that he'll fight any leadership challenge. Former RMT General Secretary Mick Lynch and Reform UK's Laila Cunningham discus Sir Keir Starmer's "in it to win it" response to a potential leadership challenge. Interview by Victoria Derbyshire.

A full list of candidates in the Makerfield by-election can be found on the BBC News website.

#politics #ukpolitics #keirstarmer #labour #labourparty #westminster #bbc #bbcnews #bbcnewsnight #newsnight #victoriaderbyshire

Newsnight is the BBC's flagship news and current affairs TV programme - with analysis, debate, exclusives, and robust interviews.