B WING

Hi there,

" Criminals serve their time, but with all respect to my friends in B Wing, I was not a criminal, not really; I was a television presenter who had made a mistake, and paradoxically, this meant that I would never serve my time."
from A Long Way Down by Nick Hornby

Could you help me by the meaning of B Wing here, please?
All I found in google was a fighter in STARWARS, but really it doesn't have any sense to me.

So many thanks in advance.

It's the name of a wing (= block) of a prison.

wing - WordReference.com Dictionary of English

4 a part of a building that sticks out from a central or main part.

So it doesn't refer to anything in particular and it doesn't have any sarcastic meaning, does it?
Thank you all anyway.