Carry On Loving (1970, Gerald Thomas)
The one with the cake fight at the end.
Sid & Hattie are liars who trick lovelorn idiots out of their cash, though his wandering ways may put the kibosh on their wee nest egg harumph.
Mostly remembered for the Butterworth cameo (" she wouldn't eat the mushrooms" ... what a punchline
), this one did make me larf regardless of how threadbare it seems once its all over. Kenneth excels as a "confirmed bachelor" (COUGH) who is forced to look for a partner in order to keep his job!! How times change. Girls next methinks ....