Factual error: On 26th May 1989, the Liverpool v Arsenal game kicked off at 8pm, which meant it would be 9:50 at the earliest before the end of the game. Sunset was at 8.59 that day (I checked!) so why is it still light when they're celebrating?
Character mistake: In the Liverpool match the commentator says that Liverpool could win their 19th title, in the 1988-89 season Liverpool had 17 titles, and won their 18th title the year after in the 1989-90 season.
Factual error: In the celebrations at the end of the film one of the celebrating supporters is wearing a pair of Reebok Classics but the design being worn was not released until 1994.
Factual error: At the end with all the celebrations one of the Arsenal supporters is wearing the shorts from the 1993 red home kit. The scene was supposed to have been in 1989.
Factual error: There's a scene near the end of the film where a road sweeper is driving around on a mechanical green road sweeper. This was supposed to be 1989 when these were first seen at the earliest in 1994.