Thanks StevePG i knew it was to good to be true. 
if i remember correctly the police have to declare locally where they are going to be positioning them, i thought he had subscribed to some sort of data base with instant updates. 
Yep they do, that's why I got the Road Angel connected as it does receive these updates in real time on the mobile GPRS/EDGE network 
Works a treat, going up the M40 last week there was a camera van on a bridge and the unit gave me plenty of warning 
Which model of Road Angel? And do all RA models have this facility? And howmuch/how does GPRS/EDGE work? 
No not all the RA's have it it's only the new professional connected version.
The unit basically has a built-in Orange Sim so it can connect to the mobile network and automatically downloads the latest updates and live camera postions over the t'internet. It also allows you to capture positions of the live cameras and send these back to RA to share with other users.
The standard subscriptions is £1 per month or £10 a year more than the "unconnected" version.
Also it now comes with a remote control to access the menus or silence the beeps without having to reach across the dashboard.
Plus it has support for an optional windscreen or front number plate mounted laser detection module.
Here what it looks like -
