Corrected entry: This film is set in 1964 and features three songs by The Who "my generation" which they dance to at the party "anyway anywhere anyhow" which Jimmy watches them perform on TV, both of these songs weren't issued until 1965.When Jimmy makes his return trip to Brighton "5.15" is played while he is on the train this song wasn't issued until 1973 strangely enough The Who were directors on this film.
Corrected entry: When Jimmy says, "That is Brighton, my sons." looking down a hill on a town supposed to be Brighton, that is actually Hove and Shoreham, the road being Ditcling Road. The reason Brighton can't be seen is because the hill is in the way. Since this scene was shot a new part of the A27/M27 has been built through this hill.
Corrected entry: Early in the film they go to a scrap yard to see a friend to buy drugs - the cars in that scrap yard are models that were new or not even launched in 1964. One car springs to mind the Austin/Morris 1100 that features in quite a few of the shots; although it may have found its way to a scrap yard following an accident the one in the shot has clearly aged - the model was only launched in 1962! (Mind you, it was a notorious rust bucket!)