Oi, mate, ain’t that an accent, right? Now piss off, you twat!

Which one?

Of course not. That simply would not do.

I know a British man in the USA. His kids refuse to do the accent as they are lazy Americans, but that dad just wants to remind everyone that he's different and unique. He's been here like 50 years and doesn't slip up often.

The Bri'ish one

i admire that dedication!

Which one?

Very few people use "Queen's English" as their normal mode of speech. It was created as a reference accent, since we had so many across the empire, the toffs could struggle to understand their staff.

Outside of that, it varies wildly. E.g. the "pirate" accent is actually just a rural Cornish accent.

Often, you can figure out where someone grew up, down to around 10-20 miles, based on their accent. Though that goes out the window when people move around and blend multiple accents together.

It's my fing init bruv

When they are alone and no one is looking they drop the accent to take a break.

Th' blighters do get knackered from tha' accent , an' they leave it to bleedin' Yanks like me to keep on wi' it, while they bunk off for a cuppa and a kip.