Watching this for the second time in several years....didn't really want to. I can't stand the Lionel Jefferies character - he is rude, obtuse, abrasive, and talks in a very annoying way! However, Keith Barron saves the episode by being a bit of a wide boy/hard man. I agree with the above posters....the Jock subplot lends itself to some hilarious humour.
I think LJ's character Cecil, is there for a bit of comedy. An eccentric old duffer who's having his swan song.
Barrons character strikes me as a bit of a slimy, lazy scrounger to be honest but that's not to say he isn't a very good part of the episode.