This was even funnier than I remember it the first time, which is unusual is it not, as it's usually the other way around i.e. rose-tinted spectacles.
Peggy Mount - what can you say about her. Absolutely superb, and was almost upstaged in a brilliant performance by the tiny Esma Cannon. Thora Hird as the nosey neighbour was great of course as she never fails to deliver.
Few familiar faces according to the IMDb, although I didn't twig them all :-
Michael Caine - in his first film apparently, Alfie Bass (wasn't sure it was him), Gordon Jackson, the even tinier Edie Martin, George A Cooper, Paul Edington (with beard, which threw me) and Henry McGee as a milkman, and again I didn't recognise him.
I think this is a much-underrated British comedy.