Hey Rainbow,
Try a search for My Family(BBC), Spaced(CH 4), Couples(BBC), Two pints of larger and a bag of Crisps(BBC), Father Ted(CH 4), Give my head peace(BBC Northern Ireland), I would avoid The Office, The Royale Family(BBC), League of Gentlemen(BBC). Of course you then have some classics like Porridge(ITV, I think), Open all Hours, Fawlty Towers, Steptoe and Son, which would never get made in todays PC world and I can't think of anymore off the top of my head, sorry.
You could also try the Channel 4 website....they have a writers link.
Sorry I can't be more help.
Regards
Bill