The Conservatives are no longer seen as a party of low taxation following Philip Hammond’s tax raid on the self-employed, a new poll for The Telegraph shows.

Just one in four voters now regards the Tories as a low-tax party, while almost half of those polled say they trust the Conservatives less as a result of Mr Hammond’s Budget. More than half of voters – 55 per cent – say Theresa May should have honoured the party’s manifesto pledge not to raise taxes.

Figures on voting intentions are equally worrying for the Prime Minister, with almost half of those questioned saying they are less likely to vote Tory because of the Budget, including one in seven Conservative voters.

The Prime Minister and her Chancellor have faced a rebellion from their own MPs following the decision to increase National Insurance Contributions for self-employed people.