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 North Norfolk Digital/Shape office was filmed at Brook House in Mitcham, London. In the school where the police are doing the investigation, there is an aerial photo on the wall, this is of that area of Mitcham, although rotated 90 degrees anti-clockwise. The larger map next to it is of Norwich.
The Chief Constable has a lot more medal ribbons on her uniform than is usual for British police officers. Although ones who are ex-military are entitled to wear medals earned during their previous service, the amount she has still isn't credible, especially for someone who looks so young.
Steve Stubbs: Alan! Read my lips. Now, if you jeopardize the safety of any of my men, or any of those hostages inside that building because you've not been listening to me; I will take off this police uniform and I will make you pay for it.