It took the BBC a couple of years after the end of "Porridge" to find another suitable sitcom for the considerable talents of Ronnie Barker, and so in 1976 they reunited him with producer Sydney Lotterby and "Last of the Summer Wine" creator Roy Clarke to portray "Arkwright", the stammering Yorkshire store keeper whose miserliness could give "Scrooge" a run for his money. He is enamoured of the well-endowed local nurse "Gladys" (Lynda Baron) whilst trying to keep his live-in nephew/dogsbody "Granville" (a wonderfully skilful series of performances from David Jason) from succumbing to the…