Trivia: The prison scenes were filmed inside a real prison. The warden of the prison agreed to the use of the prison for the movie if 1/3 of the money was used to improve the prison. Richard Pryor talks about his experiences behind the scenes on his Here And Now DVD.
Trivia: In the huge scene with the big rigs and all, the police car crashes off of the car trailer truck. But this stunt was really a world record for the longest car stunt that was powered by the car's own engine. The distance was well over 100 feet.
Trivia: A sequel to The Long Good Friday was written by screenwriter Barry Keeffe. Entitled The Black Easter Monday, the action starts immediately after that of The Long Good Friday when the car carrying Shand is stopped by police. Both Shand and the IRA gunman (played by Pierce Brosnan in one of his first film roles) bluff their way out of it and walk away, allowing Shand to escape. The screenplay was universally acclaimed but by the time it got through development hell Brosnan, Bob Hoskins and Helen Mirren had all become big stars. They could not commit to the project and their salary demands could not be accommodated anyway. The film was never made.