Lynn drives an old 1985 Austin Metro. In the second episode of I'm Alan Partridge (1997) she unsuccessfully tries to persuade Alan to trade in his Rover 800 for a much smaller and cheaper Rover Metro. Alan scornfully says he will not drive a "MiniMetro", which was the model's original name for the first two years of its production (eventually it was sold as the Rover Metro after the Austin brand became defunct). The model Lynn drives is from after the 'MiniMetro' became just 'Metro' but it's the same design.
The film's producers sought special permission by Marillion to create a running joke around a fictional portrayal of the band's drummer. The band claimed they were sufficiently amused by the clips they saw and granted permission. Members of the band also attended the Norwich premiere of the film.
When Alan first goes into the room with the hostages Jason Tresswell get up and speaks twice - once in the background and then again in a closeup scene.
Tasing someone causes all the muscles in their body to contract, therefore tasing someone with their finger on the trigger of a loaded weapon would cause them to involuntarily fire it.