Angela Rayner has been accused of plotting a ‘coup’ against the Prime Minister after it was claimed her allies were preparing an alternative programme for Government – funded by the unions and masterminded by her boyfriend.

Senior Labour figures said they had been contacted by friends of Deputy Prime Minister Ms Rayner inviting them to help create a ‘think-tank’ which would ‘promote a more confident centre-Left programme within government’.

Under the plan, the unnamed outfit – which is being seen as a vehicle for Ms Rayner’s leadership ambitions – would be run by her on-off partner Sam Tarry, 42, a former Labour MP for Ilford South who was deselected in 2022.

Last night a source close to Ms Rayner, 45, insisted the claims were ‘absolute nonsense’.

But they follow a week in which Ms Rayner waged a public war with Sir Keir Starmer and Chancellor Rachel Reeves to advance her Left-wing agenda.