Who could replace Keir Starmer as prime minister if he resigns?

Calls for Starmer to resign are growing louder. So who are the runners and riders to replace him? (Picture: Getty/Reuters)

Keir Starmer faces the biggest challenge yet of his time as Prime Minister, after calls for him to resign burst into the open.

Former ally Anas Sarwar, the leader of Scottish Labour, became the highest-profile party figure to say the PM needs to go after a dire week prompted by the Peter Mandelson scandal.

Now, Starmer faces struggling forward in the knowledge that a sizable ...