I'm sure this must have come up before, but after taking the van out for a run on the motorway and having a car drive past, then purposely let of the gas pedal so we were having to slow down, then after waving arms at me brake I want a dash cam so I don't have evidence for the police for people being stupid. I know there will be real cheap rubbish and very expensive bells & whistle stuff. But is there some thing that's good for around £50 ish area? Decent picture and recording time. I guess starts automaticity? Would I really need gps? Something that can be taken out easy to prevent theft of unit? Maybe easy to swap to another vehicle?