Sally Geeson, and Carol Hawkins in Carry on Abroad (1972)

A group of holidaymakers head for the Spanish resort of Elsbels for a 4-day visit. When they get there, they find the Hotel still hasn’t been finished being built, and the weather is awful. And there is something strange about the staff. They all look very similar. To top it all off, the weather seems to be having an adverse affect on the Hotel’s foundations…