Review announced into why some mobile phones did not receive UK test alert

The Cabinet Office said it was aware that the 10 second alert and message notification was not delivered to all mobile phone users.

The UK Government is to look into why a test of a new public alert system was not received by all mobile devices (Danny Lawson/PA) (PA Wire)

A review will be conducted to find out why some mobile phones did not receive the test of a new national emergency alert system on Sunday.

The Cabinet Office said the “vast majority of compatible phones” received the alert as part of what was said to be the biggest public communications exercise carried out in the UK.

But the Government department said it was aware that the 10-second alarm and message notification was not delivered to some mobile phones.