This is an example of a style of comedy that was very very British and also very much of its period. We see villains presented as comic rogues and policemen as bumbling duffers led by the public school class that got their promotions on the basis of the old school tie. And this at a time which saw the rise of the Krays and their contemporaries in the real London gangland!
But we don't watch these movies for social commentary; we watch them for the superb comedic talents of the cast; the cast list reads like a who's who of British comedy, Sellers, Cribbins, Stark, Jefferies, Le Mesurier....plus the unusual sight of Bill Kerr as an Aussie crook with a brilliant plan to hoodwink both the Plod and the Underworld at the same time. This movie isn't the only slapstick villain piece from that period (mid 50's to mid 60's, from "The Naked Truth" to "Go to Blazes") but it is an extremely good one.
Buy this movie. It is a passport back to a comforting world very different from our own, when Police cars still had bells and dark blue paintwork, coppers could be spotted a mile off by the Big Boots and "'Ello 'Ello" demeanour, and villains were lovable types who wouldn't harm a fly when stealing a payroll or bullion or jewels or whatever; no-one gets hurt but there's a wonderfully comic punch up at the end.
And it's one of the last chances to see Sellers before he lost his East End accent and became lost as Clouseau.