More details on the UK mobile emergency alert system have been revealed ahead of its test next week.

The message will appear alongside a loud alarm on millions of mobile phones across the UK in a nationwide test.

The system will be used in life-threatening situations including flooding and wildfires.

Now the government has shared the exact text that will appear on people’s home screens next Sunday.

The message will be received on 4G and 5G mobile phones, along with sound and vibration for up to 10 seconds even if devices are on silent.

It will say: “This is a test of Emergency Alerts, a new UK government service that will warn you if there’s a life-threatening emergency nearby.

“In a real emergency, follow the instructions in the alert to keep yourself and others safe.

“Visit gov.uk/alerts for more information.

“This is a test. You do not need to take any action.”

After the message has appeared, phone users will be asked to swipe away or click ‘Ok’ on their home screen before being able to continue to use their device.

Drivers urged to be aware of the UK emergency alert alarm

However, drivers are being urged to not look or touch their phone until safe to do so, just as you would when receiving any call or message.

Chancellor of the Duchy of Lancaster Oliver Dowden said: “At 3pm next Sunday we’ll be doing a nationwide test of our new Emergency Alerts system.

“Getting this system operational means we have a vital tool to keep the public safe in life-threatening emergencies.

“It could be the sound that saves your life.”

Domestic violence campaigners have warned the test could put people in danger by revealing the location of secret phones hidden away by those at risk.

The Government said it has been actively engaging with organisations working with vulnerable women and girls to ensure they are not adversely affected by the introduction of emergency alerts.

Officials stressed that it is easy to opt out of the system if people need their phone to stay concealed, either by turning off emergency alerts in their settings or simply having the phone switched off during the test.

The test on St George’s Day coincides with major events including the London Marathon and the 2pm kick-off Premier League ties between Bournemouth and West Ham and Newcastle and Tottenham Hotspur.

Officials said they have worked with the Football Association and the Marathon’s organisers to make sure the impact of the test will be limited.