With his government mired in scandal, an operation to dethrone Starmer is now under way

There has been a joke going around Labour MPs over the past week about three envelopes in Soviet Russia. “Whenever you run into trouble, open them in order,” the instructions go. Envelope one says: “Blame your predecessor.” So he does – and it works. The party officials are satisfied. A year later, problems arise again. He opens envelope two. It says: “Restructure the organisation.”

He does a big reshuffle, changes some titles, and again buys himself some time. Finally, another crisis comes. He opens envelope three. It says: “Prepare three envelopes.”

The problem for Keir Starmer is that the MPs sharing the joke believe he has already opened his first two. It is becoming increasingly hard to find anybody in the Labour party who will argue that things are going anything other than disastrously for the government.

They fear that attempts to deal with the multiple difficulties faced by the prime minister over the past year – many of them self-inflicted errors such as the winter fuel duty decision, the freebies row and the handling of welfare cuts – have instead unleashed more chaos.