Rachel Reeves is under fire from Labour backbenchers who say her Budget is “impossible to sell” to their “horrified” constituents.

The Chancellor had promised that her maiden fiscal statement would boost growth and “fix the foundations” of the economy.

In public, Labour MPs have been at pains to show how pleased they are with the package that Rachel Reeves unveiled last week – from their excitable cheering and waving on the green benches after the Chancellor delivered her speech in the Chamber, to the giddy atmosphere when Ms Reeves debriefed the party’s hundreds of MPs in a committee room on Wednesday.

One moderate MP from this year’s intake described that post-Budget meeting with one word: “Euphoric.”

But privately, Ms Reeves’ Budget, which featured the biggest tax rises in a generation and the biggest increase in borrowing for decades, has prompted a fierce backlash.