If 'the wee comic' in Lyn's post refers to Paul Shane, I believe that he's now back working the northern club circuit with just a few TV appearances. He played Solomon Dingle in Emmerdale last year:
http://www.tv.com/paul-shane/person/84851/summary.html
Ruth Madoc has appeared in many stage productions plus occasional TV work:
http://www.tv.com/ruth-madoc/person/113942/summary.html
You can read all about what Su Pollard's been doing, on her website:
http://supollard.org/
I'm not too sure about Jeffrey Holland but I'm fairly sure that I've seen his name outside a West End theatre within the last year or two, so he's probably concentrating on theatre work.
Simon Cadell passed on several years ago.
I believe that David Griffin is still involved in stage work. His TV appearances are listed here:
http://www.tv.com/david-griffin/person/7558/summary.html
I might be wrong nut I seem to remember hearing that Felix Bowness hassed passed away.
Leslie Dwyer died in 1986.
Kenneth Connor died in 1993.
Sorry, but I don't know anything about what's happened to Dianne Holland, Barry Howard or any other of the more minor characters.
If you're struggling to remember who played what, see here:
http://www.phill.co.uk/comedy/hidehi/
Chris