Plug this Inforad GPS (not infored) gadget into your car's cigarette lighter and it'll warn you with audio and visual alerts when you are approaching a speed camera using the published data of camera locations. Coverage spans most of UK and Europe and you can add to the database. You also get free updates for a year via USB conenction and after that subscription is £24.99pa - £89.99.
Note - Driving safely and within speed limits is totally free.
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