Scale of defeat to Greens has plunged party into fresh despair and again raised prospect of leadership challenge

Keir Starmer is facing an ultimatum from his own party to change direction or risk a leadership challenge within months after the Greens humiliated Labour with a historic byelection victory in Gorton and Denton.

Overturning a 13,000 Labour majority from the general election, Hannah Spencer, a local plumber and Green councillor, became the party’s fifth MP on Friday. Reform UK’s Matt Goodwin was second, just ahead of the Labour candidate, Angeliki Stogia.