When Ronnie tells Frances she had to cut a bit of herself off in order to grow to get over Reggie, it was the exact same thing Charles Bronson told Tom Hardy over the phone from prison who had just split up from his then girlfriend at the time using the oxford floods as a reference.
Critic Benjamin Lee of The Guardian wrote a negative review of the film, giving it only two stars: a poster for British distributor Studio Canal displayed these, but placed them between the twins' heads, so that at first glance The Guardian appeared to be one of many outlets that had run four- and five-star reviews (until Lee himself pointed this out on Twitter).
Shortly before shooting, Tom Hardy and Paul Anderson (who plays Kray gang member Albert Donoghue) co-starred together in another gangland crime drama, the award winning BBC TV series Peaky Blinders (2013). Hardy played Alfie Solomons, a brutally violent Jewish gang leader in 1920s East end London. Anderson played an equally violent and unpredictable gangster , Arthur Shelby, part of a Birmingham crime family.
Unlike the 1990 film "The Krays", the director chose to omit any scenes with Ron playing with his pet snake. Ronnie was a big animal lover and also had a pet Alsatian as a child. Incidentally,the snake was purchased from Harrods in Knightsbridge, where the twins owned the nightclub featured in the movie, Esmerelda's Barn.
The pub used is Tuners Old Star in Wapping. Many of the fittings were changed or painted over for the production. The screen that is mounted on top of the bar is real but some of it was removed for the large cameras to get the required shot. Light fittings were changed and walls were repainted for the filming. The square brewery signs are original.
The Blind Beggar pub featured in the movie is actually The Royal Oak on Columbia Road in London. The pub has featured in many British TV programs. It was the same pub used in '90s sitcom Goodnight Sweetheart (1993) and was also the scene for Victor Meldrew's failed reunion with friends in One Foot in the Grave (1990).
"Piranha Brothers" is a Monty Python sketch (Face the Press) of Monty Python's Flying Circus, September 15, 1970. The premise is a BBC current affairs documentary, inexplicably entitled Ethel the Frog, covering the exploits of the fictional brothers Doug and Dinsdale Piranha, who employed a combination of "violence and sarcasm" to intimidate the London underworld and bring the city to its knees. Dinsdale was said to be afraid of "Spiny Norman", an apparently imaginary gigantic hedgehog whose reported size varied on Dinsdale's mood. The sketch constitutes a pastiche of the real-life story of the Kray twins, famous gangsters in the East End of London in the 1950s and 1960s. Doug and Dinsdale Piranha were loosely based on Reggie and Ronnie Kray, and the policeman who pursued them, Harry "Snapper" Organs, was loosely based on the policeman who led the investigation against the Krays, Detective Superintendent Leonard "Nipper" Read. Spiny Norman is possibly a subtle reference to the notorious former head of the London Drug Squad, Detective Sergeant Norman Pilcher.
A Parisian premiere to be attended by actress Duffy was scheduled for November 17, 2015 at the Olympia concert hall, however this event was canceled following the November 13 terror attacks in the French capital.
The dialogue about Alexander the Great is wrong. Alexander was a Greek who lived in Macedonia (Macedonia was a part of Greece). Also, his teacher was Aristotle who taught him all the philosophy of Socrates and Plato. But, even he had his great master; he became an expansionary General.
A Google search of the red Triumph Spitfire Mk3 (plate: RPE205E) driven by Reggie in the film reveals that, according to official British vehicular records, was first registered in Surrey (UK) in 1967 and first driven on public roads on Friday 28 July 1967.
Tom Hardy, who plays Ronnie and Reginald Kray, also played Britain's most notorious prisoner Charles Bronson/Michael Peterson in Bronson (2008). Reginald Kray and Bronson/Peterson knew each other in real life while serving in prison together. After their first meet, Kray described it as "The most frightening prison experience I've ever had."