I have this sorted now, looking for a couple people to try it out before releasing it as a VIP member download
Its has a few quirks, because the cameras are listed as POIs you get a notification when you reach a set distance from the POI (camera) so i have had a few instances where i get a speed camera warning for a camera on an adjacent/parallel road.
The notification cannot be changed its a double bong noise and the warnings come through at anytime that the headunit is turned on, you do not need to be on nav or have a route planned
The audio fade and the volume of the warning is the same volume you set for route guidance as per normal navigation alerts