'The audience member added, "I feel it's a completely unnecessary move. It's obviously gonna be a cost to change it... I question where this country would be without such a great leader as Winston Churchill."'

The answer, sir, is slightly nearer to entering the 20th century than it currently is in view of the deference for dead white males.

https://www.independent.co.uk/tv/news/bbc-question-time-winston-churchill-banknote-b2937599.html

BBC Question Time audience member blames ‘radical left’ for banknotes change

The Independent
@wood5y Bank-notes change every ten to 15 years to keep ahead of counterfeiters. My biggest gripe about Churchill being on the fiver is that he should have been on the fifty instead with Turing on the fiver. Churchill hated the working class, and the majority of workers rarely, if ever see a fifty. But he was a nasty racist PoS so not surprised mr Gammon doesn't like him. And I bet he doesn't even know that Churchill took us into the European Convention on Human Rights that Gammon-head wants us to leave.

@Pamela1960 Tom Jones recalled that when he was a child in the valleys, Churchill was booed in the cinemas whenever he appeared on the newsreels.

See also gunboats on the Mersey, the disaster of Gallipoli, etc.

WW2 did a lot of heavy lifting to rehabilitate Churchill's very tarnished reputation.

@wood5y He was probably booed because of Tonypandy.
@Pamela1960 @wood5y 100% Tonypandy. Still reviled here....as I said above - second only to thatcher.