Yes.

They *alert* you to all the fixed gatso, truvelos etc etc inc blackspots, schools yada yada.

I swapped from a Snooper SR1 (or something or other, was a good one at the time) as it was driving me mad with its false alarms.

That said, the snooper WOULD pick up these sneaky illegally sited mobile cams.

I also use *cough cough* a garage door opener (the best bit if gadetry on th bus ever!!!!) and the road angel together and it seems to work...

A road angel is ok but is only limited to what info is downloaded onto it.