 Nearly everything had to be brought from the mainland for filming and many of the sets had been prefabricated in Ealing; the islanders were perplexed by some of the items the crew brought with them, such as the artificial rocks they added to the already rock-strewn landscape.The studio also had to send out three cases of dummy whisky bottles, as the island was short of the real equivalent because of rationing.The location shooting meant the use of a mobile studio unit for filming.