In February 2016, two reports were made to the London Metropolitan Police about a "terrorist attack" made on the Lambeth bridge, after many local citizens were not told about a controlled stunt explosion made on a double decker bus for this movie.
Liam Hennessy (Pierce Brosnan) is based on Northern Irish politicians Gerry Adams and Martin McGuinness. Adams was actively involved in the Irish Republican movement, although he denies having been a member of the I.R.A. (a claim contested by many). He later became the leader of Sinn Féin, the political branch of the I.R.A., and was heavily involved in establishing a lasting peace accord in Northern Ireland. Hennessy even shows physical resemblance to Adams (short gray hair, full beard, glasses). Adams was never Deputy First Minister for Northern Ireland. That position was filled by Martin McGuinness. In this movie, Hennessey describes a previous nickname, "Butcher of the Bogside" when referring to his terrorist past. Martin McGuinness was known as "Butcher of the Bogside".
The name of Jackie Chan's character, "Quan Ngoc Minh", suggests that he is Vietnamese with Chinese origin, as "Quan Ngoc Minh" is a Vietnamese name, but Quan is not a common Vietnamese surname (first name and last name are reversed in Asian culture, in Western format his name would be Minh Ngoc Quan").
The bus explosion was tested in the car park of Artem Ltd., the special effects company that did all of the physical effects in this movie. When the bus exploded on Lambeth Bridge, there were two technicians on-board to set it off.
If you try to determine the locales of the story, observing traffic can be very confusing, especially at the beginning of the film. This movie was filmed in the UK, US and PRC, and all but a small portion of the movie is supposed to take place in the UK, including Northern Ireland; thus, most driving should be British-style. The US and PRC drive on the right side. The UK drives on the left. The vehicles are a mix of right- and left-hand drive. In the London scenes especially, there is a confusing mix of driving and parking. Sometimes characters and traffic are driving on one side but when the scene cuts they are driving on the other side. There's also a mixture within scenes of how cars are parked; some are the UK way, and others are not. This goes on throughout the film.
The line from the first trailer, after Jackie Chan says: "Twenty thousand pounds, ("that's all I have" is also omitted from the trailer) for the name of the bombers." The line "That's not how we do things here", spoken by Commander Richard Bromley (Ray Fearon) is not in the final cut. Instead, Commander Bromley responded with, "To be clear, these are vicious men who take pride in their atrocities. This is our work, not yours. You need to be patient." and Quan puts the money away.