Opinium poll for the Observer finds a 45-point drop in the prime minister’s approval rating since he won the election

Keir Starmer has suffered a precipitous fall in his personal ratings since winning the election, according to a new poll for the Observer that comes before his first Labour conference as prime minister.

The latest Opinium poll reveals that Starmer’s approval rating has plunged below that of the Tory leader Rishi Sunak, suffering a huge 45-point drop since July. While 24% of voters approve of the job he is doing, 50% disapprove, giving him a net rating of -26%. Sunak’s net rating is one point better.