Excellent, Cailian.

Although we attended the same high school, my brother had a different accent from me because we hobnobbed with other folk.

The British changed their speaking manner noticeably through the Thatcher years. London English which embraced a little cockney, became more standard -- the plumb, lisp, circumlocutions, redundancies, and double (and triple) negatives became comic.

Immigration must also have changed the class structure in the UK -- wealthy Arabs, people from previous British colonies, and an eastward expanding EU.

Many thanks. Best.