Why did Keir Starmer have to go?

This week, we saw what is almost becoming an annual rite in the UK: the changing of the prime minister outside 10 Downing Street.

Sir Keir Starmer is the latest UK PM to bid a tearful farewell.

So why did he have to go, and what should we make of the Labour politician who will succeed him, Andy Burnham?

Guest: Andrew Neil. Formerly chairman of Press Holdings (publisher of The Spectator), editor of Sunday Times, BBC TV anchor and chairman of Sky TV. He is now a columnist and host of The Andrew Neil Report.