In the scene where Jimmy is getting ready to go to Brighton, in the background of his bedroom a radio is playing, from it can be heard Radio London.

The year is 1964 sometime during the summer months, Radio London didn't start broadcasting until Christmas that year.

In a night time shot where Jimmy and his friends are being evicted from the cafe, as they are getting on their scooters, the lines of a zig zag crossing can be seen, these weren't around in 1964.