The illegal use of Global Positioning System (GPS) jammers in the UK has been revealed in a groundbreaking study.

GPS jammers are believed to be mostly used by people driving vehicles fitted with tracking devices in order to mask their whereabouts.

In one location the Sentinel study recorded more than 60 GPS jamming incidents in six months.

To read this BBC News report in full, see:
www.bbc.co.uk/news/technology-17119768