Dr Robin Lamboll, from Imperial College London, says the UK’s plan “doesn’t have any nasty surprises”, but is not “particularly inspiring”.

He also said it gave a sense of “normality” to the Paris agreement after US President Donald Trump pledged to leave the treaty.

Sir Keir was hailed a global climate leader in November when he announced the UK’s new emissions target.

The latest plans confirm that position, says Prof Joeri Rogelj, from Imperial College London.

He said it “follows the advice of [the government’s] scientific advisory committee”, but says that policies must follow, in order to fulfil the ambitious promises.

Miliband said more details will be published soon, and that emissions from international aviation or shipping will be accounted for in plans that begin in 2033 in the Sixth Carbon Budget.

The Budget advises the government on the amounts of greenhouse gas emissions that can be produced between 2033 and 2037 if the UK is to fulfil its climate targets.

UN climate chief Simon Stiell called on other countries to submit their plans, saying “no-one can afford to miss out”.

The plans must be received before 10 February, ahead of the next UN climate summit COP30 in Brazil in November.