[Malcolm]

On my GTD I have a very slight blue tinted front screen. I think it is 5%? If you didn't know it was tinted it is hard to spot, but it does have an effect at keeping the heat build up down just a little.

I saw a rear view mirror camera set up on a van once. The camera is fitted to the rear of the vehicle, in this case next to the door locks, and the display is rear view mirror shaped but a bit bigger and clips over the regular rear view mirror. It seemed to work well as I recall. I was told cost was about £300.