Boris Johnson aiming to stay in Downing Street until 2030s

British Prime Minister Boris Johnson departs 10 Downing Street (Dominic Lipinski/PA)

Boris Johnson has said he is planning to be British Prime Minister into the 2030s despite Conservative critics plotting to oust him after voters rejected the Tories in a double by-election defeat.

Mr Johnson insisted he was “thinking actively” about fighting the next two general elections to become the longest-serving post-war leader.