UK tests alert system on mobile phones

The UK conducted its first test of a new emergency alert service on Sunday, with millions of mobile phones emitting a loud alarm and vibrating.

The national system, modelled on similar schemes in Canada, Japan, the Netherlands and the United States, aims to warn the public if there is a danger to life nearby but has generated criticism over "nanny state" intrusion.

The alert was due to go off at 3:00 pm (1400 GMT), although some phones sounded the alarm before the scheduled time, and others minutes later.

Some users on social media complained that they had not received the warning at all.