Incumbency bias
As a general rule I am not a fan of best Prime Minister polling because there is a strong incumbency bias, Jim Callaghan led Margaret Thatcher on this metric on election day in 1979.
This type of polling is only useful when the an opposition leader takes consistent leads in this poll as it usually presages a change of government however there is something very interesting which will make grim reading for Kemi Badenoch, she is barely beating Nigel Farage amongst 2024 Tory voters, which indicates it will be a real challenge to hold onto to the 2024 Tory vote, which already had hit a new low for the Tories.
TSE