When Jimmy and Steph are running through the streets during the riot, Steph's shoes change from white stilettos to dark flat shoes and back again.
The fly-screen on the scooter that Jimmy steals disappears then reappears in the next shot.
The sign on the palm reader's shop front changes.
During the beach fight, John is fighting a rocker in the sea, however in the next shot of the gathering in the narrow street he is bone dry.
Jimmy's cigarette disappears between shots whilst handing pills to Steph in the café.
The scene shot at the railway station where Jimmy is waiting to board the train for Brighton was shot at Paddington. Trains for Brighton leave from Victoria.
When Jimmy boards the train to Brighton, the locomotive shown is a Class 50, number 50 008. This number was applied in 1974, and the class was used exclusively on Paddington services, at the time of filming.
When Jimmy enters the scrap yard to see Peter Fenton, an 'NF' (National Front, a British white supremacist political party) graffiti is seen scrawled on the gates. The National Front was not officially formed until 1966, and its 'NF' symbol was not commonly seen in graffiti until the mid 1970's.
To get down to Brighton, Jimmy says that they left London while it was still dark, and in the scene when he's getting dressed to leave, it's pitch black outside his windows while the radio says the time is 6:01 AM. The beach fight/riots take place during the Whitsun Bank Holiday, which in 1964 took place on May 18. Sunrise in London on May 18 is at 5:05 AM so it would have been fully light by 6:01 AM.
Dozens of people appear in court and are tried and convicted within two days of the riot. Real court cases even for minor offences take several months; this may have been the exception as a Special Court would have been set up within days to accommodate and proceed with the necessitates of convictions etc for this type of behaviour.
Large numbers of passers-by are watching from the promenade during the filming of the beach fight scenes. They (and their late-1970's clothes) appear in several shots.
When Jimmy is giving Steph a ride home, his scooter comes to a halt. Then the scooter accelerates away while Jimmy's left hand is still squeezing the clutch lever. He releases the clutch lever only after the scooter has picked up speed, indicating that it is on a trailer being towed by a camera car.
In the scene where Jimmy and Steph are riding on Jimmy's scooter, they appear to be travelling at normal speed, but Jimmy keeps the scooter in first gear. This is because the scene was shot with the actors and the scooter on a trailer being towed by the camera car.
A cinema advertising Heaven Can Wait (1978) (released in 1978 can be seen in the background when the Mods fight against the Rockers.
The double LP "The Who Sell Out" and "A Quick One" special edition was not released until 1974.
Rockers are wearing "MOT...RHEAD" T-shirts but the band didn't exist yet.
During one of the riots, a Pelican crossing is seen, but this was introduced in the mid-'70s.
Many late 1970s cars are seen in the background. Particularly during the "Goldhawk Road" and "Brighton riot" scenes. Similarly, all the street furniture, road markings and road signs are from the same era, and signs can be seen in (Brighton) shop windows advertising credit cards.
The shadow of the helicopter that filmed the final scenes on the white cliffs at Beachy Head is visible. Most people call these the white cliffs of Dover, but they aren't. The cliffs at Beachy Head are higher than the white cliffs of Dover.
In the last scene where Jimmy is riding along the cliff top, the reflection of the camera and lighting car can be seen in the left hand 'bubble' of the scooter.
On the road to the coast, the scooters stop and Jimmy shouts "That is Brighton." Actually, what we see in the distance is Eastbourne.
The action is set in west London yet a sign for "Coppins of Croydon" is seen clearly.
When the Mods are riding down to Brighton, and Chalkie runs into the bikers gang, a road sign behind them says Iver Heath (in Buckinghamshire), which is north of London and completely the opposite direction to Brighton (in Sussex, on the south coast) and which is also the home of Pinewood Studios.