Sure they do. I live in london. Go to shepherd's bush market[0] and you can find cooking bananas like plantain, bluggo and matoke (my fave), and for desert bananas you can find fig/monkey bananas, red bananas and I think I've seen more. Go somewhere caribbean oriented and you'll have a better chance. Plus you'll find other unusual stuff too.
[0] worth it just for being the polar opposite of a sterile, well ordered, monoculture of a supermarket. It's fab.
(Edit: I didn't read your comment properly so my reply isn't so relevant)
[0] worth it just for being the polar opposite of a sterile, well ordered, monoculture of a supermarket. It's fab.
(Edit: I didn't read your comment properly so my reply isn't so relevant)