According to the Daily Mail (!), EU plans will require every new car sold in the UK from October 2015 to have a 'black box' device. The gadget contains a phone-like SIM card which tracks drivers' movements; these are designed to help emergency services find vehicles in the event of a crash. The Government believes the 'eCall' device will add at least £100 to the cost of new cars, and officials also fear it could be used by police to monitor motorists' movements. But ministers admit they are "powerless" to stop [such] "Big Brother technology".
A more balanced view, on the many positive aspects, is here.