The British prime minister is facing a tough challenge as populist challengers, Reform UK, led by Nigel Farage, gain momentum in the polls.
Reform UK says "serious surgery on the system" is required.
Despite being in power for over a year, Keir Starmer's centre-left Labour Party has yet to show voters that he is truly in command. The government has been hit by a series of unforced errors, particularly on the issue of migration.
Author's summary: Britain's prime minister faces a challenge from Nigel Farage.