Keir Starmer has insisted he is “not going anywhere” after the number of Labour MPs calling on him to resign rose to over 100 in the wake of Andy Burnham’s by-election victory.

But what would happen if he did resign as leader of the Labour party?

If he chose to step down with immediate effect, the cabinet, together with Labour’s National Executive Committee (NEC), would appoint a senior minister member to serve as an interim Prime Minister until a leadership contest concludes.

But as we saw with Conservative Prime Ministers David Cameron, Theresa May and Boris Johnson, an outgoing Prime Minister typically remains in office in a ‘caretaker’ capacity after they announce their intention to leave Number 10, only leaving when the party has chosen its next leader.

Once the Labour party elects its new leader, the outgoing Prime Minister would formally tender their resignation to the King and advise them to invite the newly elected leader to form a government. The new leader then automatically becomes Prime Minister.