King Charles III arrived at Buckingham Palace on Friday morning (5 July) ahead of accepting Rishi Sunak’s resignation. It is the King’s duty as head of state to appoint a new prime minister after the general election, which Labour won by a landslide overnight. The role is one of the few remaining personal prerogatives of the sovereign – Charles does not act on advice nor need to consult anyone before doing so. Charles is set for the third prime minister of his reign, after Sir Keir Starmer lead the Labour to victory. Mr Sunak announced his resignation in a speech outside No 10 on Friday morning.