Keir Starmer and Kemi Badenoch's lunchtime sandwich split

Nigel Farage, who is well-known for his boozy lunches, has also weighed into the debate.

In a video on social media, the Reform UK leader said he thought lunch was "pretty cool" as he sipped from a glass of red wine at a restaurant table.

Jim Winship of the British Sandwich Association, unsurprisingly, hit back at Badenoch's comments.

He told Matt Chorley on BBC Radio 5 Live: "Rubbish isn't it? We eat 3.5bn commercially-made sandwiches every year, this is part of our heritage.

"The first sandwich was recorded as being made in 1762 by the Earl of Sandwich when he called for some cuts of beef to be brought to him between slices of toast so he could play cards.

"Sandwiches have been on the menu for a lot of people ever since then."

They may be part of the UK's heritage but Badenoch is not alone in her deep dislike of sandwiches.

Earlier this month, actor Anna Maxwell Martin told The Sun, external: "If I'm on a set and sandwiches are brought on - it's hard for me to even say that word - I'd have to say 'get that out'."