Have a look at
Pocket GPS World where for £19 per year you get a better database than TT, including Mobiles, Red Light and Specs. You can also download .ogg files which for example says 'Warning - Gatso ahead - speed limit 30 mph', rather than a bing or a bong. You can also set different warning distances for speed limits e.g. 300 yards for 30 mph, 400 yards for 40 mph etc.
PLUS, if you have Sunscribed and are first to report a new camera, which has to be verified, you would be entitled to free lifetime downloads.
Check them out and see what you think.