GB News presenter Tom Harwood halted today’s instalment of the programme to deliver a breaking alert while standing outside No.10 Downing Street this afternoon. He told viewers what is needed for a formal leadership challenge to be brought against Sir Keir Starmer following heavy Labour losses during Thursday’s local elections. Harwood began: “It feels like the sands are shifting here in Westminster, and crucially, the number we all need to have in our minds is 81. 81 is the threshold by which any MP can bring a challenge against Sir Keir Starmer. Now it’s interesting to look at what Catherine West has been doing because she has basically been organising a petition of Labour MPs to try and force the Prime Minister’s resignation. “But it’s a petition that carries with it a threat. If that petition gets to 81, West has previously said she would be minded to stand for the leadership herself. If the Prime Minister sees this petition and refuses to stand down as he has indicated in his speech earlier today, could …