Goodness, some shows on this thread that I've never heard of! Presently the That's TV channel is showing a whole bunch of shows, Just Good Friends (Paul Nicholas, Jan Francis, and some skilled support), Whatever Happened to the Likely Lads, Three Up Two Down, the wonderful Rising Damp, Goodnight Sweetheart, You Rang M'Lord (a weird blend of Hi De Hi & the Indian Army one!), 2point4 children, the dreadful Some Mothers Do ave em, and lots more. Talking Pictures has that gentle comedy with Handl & Pickles (For the Love of Ada), and Going Straight is just starting a re-run on BBC 3 or 4. Drama and Gold channels also have old sitcoms of course.
One obvious point is that most of the old sitcoms are funnier than the present ones?!