The uncertainty comes as Andy Burnham returns to Westminster after winning a seat in parliament, fuelling speculation that he could emerge as a contender should Labour enter a period of transition.
Is Starmer's position becoming untenable? What does the turmoil say about the state of British politics, a decade after Brexit? And who could be next to lead the country?
Gavin Lee speaks to Matthew Torbitt, former Labour advisor and political commentator, as well as FRANCE 24's London correspondent Bénédicte Paviot, about the growing pressure on Starmer, the shifting balance of power within Labour and what could happen next at Westminster.
Produced by Gavin Lee, Alessandro Xenos, Maya Yataghene, Emmanuel Miculita and Guillaume Gougeon
