[foobarbazqux]

Oh, I'm not really disagreeing. The expression "a : b :: c : d" means a is to b what c is to d. There are just as many American accents as British accents, but Brits commonly refer to the conglomeration as American English, or to someone having "an American accent", and can have a similarly hard time differentiating between them.

So "British English" just refers to speaking English with one of many British accents, I'm guessing in this case approximately London English that is not Cockney.