We all like to have a bit of fun on the road where appropriate. Trying to mitigate it with gadgets wont look great in front of the local beak regardless of wether its technically perveting the course of justice or not.
Now i know from personal experience that these type of fines are indeed means tested so im not sure how great a value these things will look in that context.
What are folks trying to achieve here. You want to avoid getting nicked unfairly? When is it unfair exactly? Its an odds game, over time it will even out.
Even a dashcam is potentially a self incriminating device...
Have an appropriate blast by all means as we all like to do but bin the gadgets and just keep your wits about youwould be my take on it.