This doesn't exist. Why? Well, most Americans think that England (London, Brighton etc) is Britain, and when you imitate us you do some posh git accent, like the queen. Britain is made up of 4 countries, England, Scotland, Wales and Northern Ireland. If you went to all of these places back to back, you would realise that we sound quite different. If you do your posh git accent, at least call it an English accent, even though as someone from Liverpool who is half Irish, it would sound nothing like me, my family or my friends. You then do your fake Scottish accents (which are horrible). At least you call them Scottish accents, not British. And don't you lot dare get a Scottish accent mixed up with an Irish one, or I'll have your guts. If you muricans get it in your heads that it's English, Welsh, Scottish and Irish, you then have to know what accent you're doing. You can't do some cockney voice and say that you're from Newcastle. Someone from Aberdeen sounds different to someone from Edinburgh. I might sound like a Karen, but I won't stop until Americans get it right. Thank you for coming to my ted talk.
American: *does posh voice* oh, lardy da, off to see the queen and drink some tea. Did you like my British accent?
Any Brit ever: *stares at them* no
How early is said in the ultimate sea shanty, drunken sailor.
"What shall we do with a drunken sailor, what shall we do with a drunken sailor, what shall we do with a drunken sailor earlie in the mornin?"