The Labour Party is in a state of flux, with a leadership challenge on the horizon. Catherine West, a Labour MP, has issued an ultimatum to Keir Starmer's cabinet, demanding that they either challenge the Prime Minister or she will. West's intervention comes in the wake of a series of election losses for Labour, including a stunning defeat in the local elections, where Reform UK gained over 1,400 seats. The situation is particularly dire in England, where Labour lost 1,496 seats, compared to the previous set of elections. The party's majority is now fragile, and the need for change is evident. West's challenge is not without precedent, as the process for challenging a Labour leader is outlined in the party's rules. A challenger must be supported by 20% of Labour MPs, currently 81 people, and must be an MP themselves. This rules out Andy Burnham, the Greater Manchester mayor, who is seen as a potential leadership rival. The prospect of a leadership challenge is now front and centre, with many Labour MPs deeply unhappy with the current situation. The question remains: can West get the numbers she needs to force a leadership vote? The answer may lie in the coming days, as the Labour Party navigates a turbulent period in its history.