During the French "pardon" (the procession through the streets) the choir are singing French words to the tune normally associated with Amazing Grace.
On the beach Ma lays on an inflated lilo, however these where invented in 1961, slightly latter than the 1950,s where is set.
Brittany is in the same climate region as the UK, and has much the same weather, with many rainy days and no dry periods.
Charley (Philip Franks) is shown reading the 1948 murder mystery novel 'The Lift and the Drop' by the author G.V. Galwey. Galwey worked in advertising and after service in WW2 wrote 3 novels featuring the detective Chief Inspector Bourne of Scotland Yard: Murder on Leave (1946), The Lift and the Drop (1948) and Full Fathom Five (1951)