Never forget that the classic video game Lemmings is itself a British creation.

This would be my pitch:

Greggs pasty, or a nice cuppa (pending inevitable bickering over exactly what shade of tea)

Edit: Differentiate ourselves from the other place with an icon of a duck

I was always fond of this image, but am loving the lemming top hat.

A buttery crumpet?

Just for fun I asked gpt-4 what the most British thing is, I then asked it to make a prompt for midjourney. Here is the result. (Don't question the alien hand)

Lemming wearing a top hat and monicle. Drinking a cuppa

An imposing picture of Mr Blobby

A deckchair? A pub sign?

How about this most British of pictures? Angry person, reactolite glasses, a sausage ready for the back garden barbecue and even a sneaky garden fence. If there was a wheelie bin in there it would cover 90% of normal chat :-)

(Edit: and please for the love of all that is holy do not use a top-hat or a monocle. Those are lazy parodies of Britishness used mainly by Americans whose idea of the UK comes from The Crown and Downton Abbey. There's only one person who I can even imagine wearing either item regularly and I would probably get banned for saying what I think of him.)

The Alonso Deckchair image with the Union Flag as the background. Also give Alonso a Top Hat plus Monacle

I propose this cute rubber ducky! All hail the duckies!

I now think a duck would be the funniest. Obviously, the ultimate "middle-finger" to the old regime.

Spotted dick and tea.

America gets gun and hamburders.

India gets many phone icons.

Australia gets scary spider on a dingo.