Rishi Sunak’s popularity has sunk to its lowest ever level after the prime minister scrapped a series of climate pledges.

The prime minister’s net favourability rating has plunged to a record -45, according to a YouGov poll carried out in the days after his speech on net zero policy.

The poll, conducted on 21 and 22 September, shows 68 per cent of voters have a negative view of Mr Sunak, up from 67 per cent in late August.

By comparison just 23 per cent now have a positive view, down from 26 per cent at the last poll.

It comes after research by another pollster, Survation, found that large majorities of voters support climate action – especially in so-called “Blue Wall” seats Mr Sunak wants to hang on to at the next election.

The latest YouGov poll looking at Mr Sunak’s popularity found that the PM’s popularity has taken a particular hit among Lib Dems voters who the Tories are competing for in these marginal seats.