Yeah, the new London speech of the young, with an 'inn' sound replacing the old 'ing' at the end of -ing words, and all those Caribbean usages and rhythms, is interesting.

It's not the first change in Cockney accent, though - Dickens phonetically quotes Cockneys as switching V and W sounds and dropping aitches. I've heard this kind of speech in very old Cockneys, Jewish people from the rag trade, but it's almost gone now, if not gone altogether.