LONDON, UK – The government has launched a new emergency alert system that will send a siren-like alert to mobile phones.

The system will give the government and emergency services the ability to send a message directly to mobile phones when there is a risk to life. When your device receives the alert it will vibrate and play a loud siren-like sound for up to 10 seconds.

The siren will be accompanied by a notification on your home screen, which you will have to acknowledge before you can use other features. The notification may include telephone numbers or website links containing further information.

The new system, which will go live on Sunday 23 April, should allow the government and emergency services to get urgent messages quickly to nearly 90 per cent of mobile phones in a defined area. Any compatible device within range will receive the message.

The alerts can only be sent by authorised government and emergency services users. The alerts will always include the details of the area impacted and will provide instructions about how best to respond, including links to gov.uk/alerts, which will provide further information.

The messages will be broadcast from cell towers near the emergency, ensuring that they are secure, free to receive and one-way. People’s privacy will not be affected as the alerts do not reveal anyone’s location or collect personal data.  

Members of the public should receive the alert about four to 10 seconds after it has been sent. By contrast, SMS messages can take days to release when sent to the entire population and will not be received by people from outside the UK.

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