When Reggie is talking to Frances sucking the Lemon Sherbet she gives him, he crunches it and eats it. Just before he leaves, he takes the intact sweet from his mouth and hands it back to her.
During Reg and Ron's fight in Esmerelda's Barn, Reggie throws Ron over a table. In the next shot, Ron is lying on the floor with his glasses on. In the shot after that, Ron's glasses are lying on the floor next to him.
The scene showing Ronnie and Reggie being acquitted in court ends with the judge banging his gavel. British judges have never used gavels.
In the final credits, Pellicci's café is spelled "Pelliecci's."
Reggie steals handcuffs from the prison officer, then take his baton. Prison officers don't carry handcuffs, and only have batons in riot gear.
Early in the film Charlie Richardson is arrested whilst watching the FIFA World Cup final between England and Germany which took place on July 30, 1966. Later in the film they show the George Cornell shooting as taking place at a later date, but this actually took place on 9 March 1966.
In the 1960s, London Metropolitan police Constables and Sergeants wore blue shirts with duty armlets, not the white shirts shown in the film. Caps didn't have black and white checkered bands until the early 1970s.
When Reggie picks up Frances for their first date, he shows her into the right side of the car. The UK drives on the left, so passengers usually sit on the left side. However, Reggie's car is a American car with left-hand drive.
Harold Wilson talks about the Kray-Boothby-Driberg connection at Chequers, the Prime Minister's country home. Wilson was not yet Prime Minister in summer of 1964 when these events actually took place, but the film places the scene after the World Cup Final in 1966, which was after Wilson was elected. Harold Wilson and his lawyer, Arnold Goodman were involved with the 1964 cover-up. The film has used artistic license to place these events when Wilson was actually in power, to emphasize the Krays' influence in high circles.
At the Greek restaurant, Alexander the Great is called Macedonian, not Greek. The ancient Macedonians were a Greek tribe, like the Spartans, Athenians, and Thessalians. Modern ethnic Macedonians are Slavs, with no relation to ancient Macedonians. Still, Alexander the Great was King of Macedonia, so it's entirely correct to call him Macedonian.
The arrest of Charlie Richardson during the 1966 World Cup Final is presented as an anecdote about Richardson that could be considered either a flashback or flash-forward.
Reggie and Frances talk in a downpour while trying to put up the Triumph's convertible top. Frances then walks back inside, followed by Reggie. In the last wide shot the rain falls from two distinct directions, meeting in the middle.
When Ron says he is telepathic, he's wearing a green cardigan. Later, Reg speaks to the doctor and is given Ron's drugs. He is wearing the same green cardigan Ron wore in the previous scene, revealing that the same actor is playing both men.
When Ron throws the bottle at Reggie during the fight in the club, the bottle flies past Reggie, strikes a woman in a gold dress, and shatters into hundreds of pieces. It's obviously a prop bottle, a real one wouldn't shatter after hitting a soft human torso.
It is raining when Frances leaves her brother's flat to go to cover the top of her Spitfire a short distance away. When she reaches the car seconds later, her hair and clothes are totally drenched.
The red Spitfire's bumper is higher than a real-life Spitfire of the time.
On visiting the body of Frances, Ronnie picks up the empty pill bottle. it is clearly a modern plastic one. you can also hear this as he puts it down.
When the psychiatrist at the hospital gives Reggie a bottle of anti-psychotic pills for Ronnie, he incorrectly calls them 'Stemetol'. The tablets are actually 'Stemetil'.
The Ford Galaxie 500 used to drive Reg around has modern speakers in the rear shelf.
In the Double R Club early in the film, the singer sings "The Look of Love". Later footage shows England winning the World Cup, which happened in July 1966. "The Look of Love" was written for Casino Royale (1967).
In exterior shots of Cedra Court, the block of flats where Ronnie and Reggie live, most of the windows are modern UPVC replicas of the original 1930s steel frame 'Crittal' windows.
When Reggie and Frances are walking through London in wintertime, the black Austin FX4 Taxi is a 1970s model. A 1960s model would have 'bunny-ears' indicators above the passenger doors and Austin-Healey style taillights.
Frances parks her red Triumph Spitfire in front of a block of flats with double-glazed windows.
When Reggie is talking to Frances the first time he takes her to the club it is possible to hear the music from the band and the chatter of the surrounding patrons.
As their conversation becomes more intimate, even though the singer is still singing, the music slowly fades. However, the noise from the crowd can still be quite distinctly heard.
As their conversation becomes more intimate, even though the singer is still singing, the music slowly fades. However, the noise from the crowd can still be quite distinctly heard.
At about 1:54:16 as Reggie is driving from Frances' grave under his eye instantly puffs up randomly.
Ron mentions Agamemnon returning to Ithaca. Agamemnon was king of Mycenae. Odysseus returned to Ithaca.