UK 'over-reliant' on GPS signals, engineers warn

The UK may have become dangerously over-reliant on satellite-navigation signals, according to a report from the Royal Academy of Engineering.

Use of space-borne positioning and timing data is now widespread, in everything from freight movement to synchronisation of computer networks.

The academy fears that too many applications have little or no back-up were these signals to go down.

Receivers need to be capable of using a variety of data sources, it says.