I've recently been working my way through these earlier, black-and-white CARRY ONS, finding them a breath of fresh air after the stale sauciness of the later entries. CARRY ON CONSTABLE, while proving less imaginative and well-made than some of the other entries made around the same time (such as NURSE and REGARDLESS) is still a fun little film.
Sid James joins the series as a likable sergeant forever at the mercy of his stuffy superior (a wonderfully straight-laced Eric Barker). After a flu epidemic, he takes on five new recruits (Williams, Connor, Hawtrey, Phillips and Sims) who soon get into all manner of pratfalls. The cast are good, even if the jokes aren't (most of them are over obvious, such as the bit with the out-of-control police dog). Even the predictable ending lacks bite when compared to the genuine thrills that concluded the later CARRY ON CABBY.
There's more of an emphasis on sweet romance here than crude gags, which is a pleasure. Williams plays the smug one, Hawtrey is accident prone and scene-stealing, as ever, while Sims plays it relatively straight and Phillips chases skirt wherever he can (Shirley Eaton memorably pops up out of the bathtub in one scene). Connor is unfortunately saddled with a superstitious character who ends up more irritating than amusing. There are better CARRY ON films out there, but compared to the ones being made a decade later this is pure class.