Rumours abound that a leadership challenge will be made against Keir Starmer before the next election, possibly as early as before the 2026 local elections. Leadership challenges work a little differently in the Labour party than they did for the Conservatives: A leadership challenge is deemed to have been mounted when the Labour Party confirms that a valid nomination has been received for a leadership election while Keir Starmer remains leader. A valid nomination must come from a sitting Labour MP who can present the National Executive Committee with a valid list of nominations from 20% of sitting Labour MPs, so 80 of the 401 as at time of market creation.
This question asks, who will submit a leadership challenge before Keir Starmer leaves his post as leader of the Labour party?
If a name listed on this market is reported by the BBC to have met the nomination threshold and their submission accepted by the NEC, their name will resolve YES. Otherwise all names will resolve NO when Keir Starmer announces his intention to stand down, or otherwise ceases to be leader of the Labour party.
This question is specifically about the challenge and not winning any subsequent leadership election.
Update 2026-05-14 (PST) (AI summary of creator comment): Resolution will be based solely on Labour NEC confirmed candidates. Every candidate must independently meet the 20% nomination threshold — there is no provision for candidates to join a contest without having met the threshold themselves.
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@Roddy my understanding is that the rules as written require candidates to have the nominations and so there should be nobody sticking their hand up and saying “put my name in the hat too” without having met the threshold for a YES resolution. Rayner’s statement this morning means either she doesn’t understand the Labour leadership challenge rules, or she expects the contest to go off-book. I’ll be resolving this purely on the basis of Labour NEC confirmed candidates.
@ChrisGardham @Noit Can you formally confirm that this refers to Al Carns (despite misspelling), so we can avoid shenanigans from bad actors in the future?
Reminder: a leadership challenge only counts for resolution if they get the number of nominations to trigger the actual process. If anyone (cough Wes cough) makes an announcement that they’re going for it, I’ll not resolve yes until Labour hq confirms the nomination threshold is met.
From today’s Politico London Playbook:
Heir to Keir: The Guardian’s Jessica Elgot also found Labour MPs complaining about the lack of a viable leadership candidate brave enough to trigger Starmer’s downfall. Angela Rayner is waiting for the judgment of HMRC over her unpaid stamp duty, while Wes Streeting is seen as a Mandelson acolyte and is keeping his head down. Ed Miliband and Shabana Mahmood are also “not ready to pounce,” a Labour MP tells Playbook’s Bethany Dawson.
Good to go: The Daily Mail clearly has different sources, who are claiming Rayner has told her friends she is ready to launch a leadership campaign if Starmer resigns — and has quietly amassed a £1 million war chest.
@JussiVilleHeiskanen you can add anyone you like, they have to be an MP to mount a challenge but I’m sure people will bet accordingly.