The title of the restaurant where the main character meets a Hungarian mobster is not Hungarian. It is Lithuanian. (Berneliu Uzeiga or Shepherd's Inn in English).
Larry Lamb was born in Edmonton, North London. The same place where the real loot from the raid was buried, in Edmonton cemetery.
Matthew Goode's character is a construct of the film and was not involved in the real-life heist on which it is based.
Larry Lamb plays Brian Reader in this movie, previously the real Reader was Brinks-Mat launderer Kenny Noye's sidekick. In the 1992 movie about the Brinks-Mat robbery, Fool's Gold, Lamb was cast as Noye.
Larry Lamb, who plays Brian Reader, had previously played another real life criminal, Bruce Reynolds, in Buster (1988).