George mentions that 1962 was the year that the American pop band The Beach Boys formed. While their first album "Surfin' Safari" did come out in 1962, the band formed and released their first single in 1961.
During some of the scenes outside the bank, the sea can be seen down the street, e.g. when Simon meets Emma, dressed as a prostitute. Manchester is inland, whereas Liverpool (where the scenes were filmed) is beside the Mersey Estuary.
Simon Garden's correct job title would be "probation officer" in England. "Parole officer" is an Americanism, and is probably used for the international market. However, while "parole" is used in the title of the film, "probation" is used throughout the film script.