
The emergency phone alert system caused more chaos yesterday when it went off again in the early hours
It came despite government assurances the test would only sound at 3pm on Sunday.
Danny Wisniewski, of Slough, Berks, was woken by the alert at 2.22am.
He said: "It scared the life out of myself and my wife as we were fast asleep and wondered what was going on.
"It was the same alert I had on Sunday."
Plumber Mark Peters, 54, of Derby, got the alert at 8am.
He said: "It doesn't bode well if this is supposed to be keeping us safe and alert."
Sources suggested the problem was caused by mobile phone masts continuing to broadcast the message after the end of the test.
The Cabinet Office said it is reviewing the results of the UK-wide test after a "very small proportion" of mobiles did not get Sunday's alert.
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