Blaming "negative publicity," which included investigative reporting that they had not updated their computer, closed circuit, or alarm systems in at least 15 to 20 years, the Hatton Garden Safe Deposit Company unsurprisingly went out of business just a few months after the events shown in this movie took place.
The retro shot at the end of this movie of a young Ray Winstone (Danny Jones) is from the movie Scum (1979).
During the opening titles sequence, there is a brief clip from L'or se barre (1969) (which starred Sir Michael Caine). The clip is the Chinese gold being lowered from the cargo plane at Turin Airport. The retro shot of Sir Michael Caine at the end of this movie is also from the same movie.
The events depicted in this movie are, astonishingly, based on a true story. During the Easter bank holiday period of April 2015, a gang of middle-aged and old age pensioner veteran criminals, along with one much younger "rookie," really did break into the Hatton Garden Safe Deposit Company in central London using the methods depicted in this movie and stole somewhere between £14-25 million worth of valuables from safe deposit boxes (the exact amount is unclear as customers with safe deposit boxes didn't necessarily want to report what their boxes contained). The initial success and surprise of the robbery, however, was short-lived, as the perpetrators were caught within a matter of a few weeks by police after modern crime solving methods and clumsiness by the thieves themselves resulted in a string of arrests.