The two I've whittled down to are both single channel (front) and sub £100. I know there are arguments for spending more but I just want one that will record accidents/incidents not film a Hollywood epic.
First is the VioFo A119S and the second is a DDpai mini 2. Performance wise they are not far apart, the main difference being the VioFo has a small display screen. They both look discrete when installed.
https://www.youtube.com/watch?v=oHtem_iBdO4
Anyone have any experiences using other devices, or pointers?