One of the most involved of all the Carry On plots, even bordering on the political (a first) in its comedy of unionised shop floors and frustrated businessmen (personified by an arch and devious Kenneth Williams, of course, as W.C. Boggs himself) trying to keep the work force in place, but deep down is still a silly farce boasting every possibility of toilet gag. For once, Sid James takes a more fatherly role as perpetual union irritant Sid Plummer, it’s his daughter Myrtle (a pretty Jacki Piper) who is busy playing the bosses son Lewis (Bill Maynard) off against young union rep Vic (Kenneth Cope). Strikingly (no pun, intended) this is one of the least lurid and the film suffers accordingly.
Elsewhere the usual faces (but no Barbara Windsor) are caught up in numerous subplots involving Charles Hawtrey playing strip poker with a Vic’s mom (why?), Sid’s budgie picking the racing winners, and a good lot of familiar slapstick on the works outing. But it’s too fussy and flat, too preoccupied with its setting, to rank highly in the series.