Siren sounds have blared from mobile phones across the country in a test of the national emergency alert system

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UK emergency alert system explained
Brits have complained they did not receive the emergency alert broadcast by the Government to phones today.
At around 3pm on Sunday, mobiles connected to 4G and 5G networks vibrated and sounded for about 10 seconds in the second test of the system – after the first in 2023.
But some are concerned that their alert was late or did not sound at all.
One person wrote: “The government telling us the emergency alert would go off at 3:00pm but it actually went off at 3:01pm.”
“The emergency alert looms,” replied another.
Others complained they hadn’t received it at all. “Did anyone else not get the emergency test alert? no message, no noise, nothing,” someone wrote.
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