This is definitely one of my favourite films of all time, and provides a brilliant time-capsule of inner city London in the period just after the war when rationing continued even if the bombings had stopped, and communities were looking hopefully ahead to a more prosperous, settled time.
Its cast of familiar faces - Stanley Holloway, Margaret Rutherford, John Slater, Raymond Huntley, and the wonderful Basil Radford and Naunton Wayne (Charters and Caldicott in The Lady Vanishes, etc) - make this a real treat, and one of the very best of the Ealing comedies.
It would be impossible to remake this film, since it refers so charmingly and specifically to an era which was relevent only to its own time and to its own situation, both historically and culturally.
I don't want to provide any spoilers, but I will say this - if you are capable of shedding your sophisticated expectations and enjoying a good film made in a simpler age, please watch this! I don't think you'll regret it, and I suspect you may end up cherishing it, as I do.