Originally the episode was going to be filmed in Spain, but the BBC ran out of budget and settled for an extremely cold Poole.
Grandad mentions that the Trotters have never been good sailors, setting the scene for Uncle Albert's escapades.
To try to transform freezing Dorset into sunny Benidorm, the production crew turned the lights way up bright; in subsequent episodes where the Trotters went abroad like Miami or Monte Carlo, the BBC had the budget to send them there.
Grandad refers to his mate 'Nobby Clark' when he's telling Del and Rodney about his mate who did the gun running with him in the War. Kenneth MacDonald (who later played Mike the landlord) in It Ain't Half Hot Mum (1974) was a gunner named 'Nobby Clark'.
During the montage sequence the Spanish immigration officer is played by Graham Cole, later to become famous as "PC Tony Stamp" in The Bill.