UK's Emergency Alert System Successfully Tested, but Five Million Users on Three Network Did Not Receive Alert

However, an estimated five million users on the Three network did not receive the alert.

Despite this, the test was considered a success, with the system reaching around 93% of compatible devices in the UK.

The government's emergency committee, Cobra, is now suggesting the system be tested every two years to ensure the technology is operating smoothly.

This is in line with international standards, and many other countries regularly test their emergency alert systems.

The UK's first emergency alert test was "far and away" the biggest public message ever sent out, according to Roger Hargreaves, director of Cobra.

The test message reached 93% of compatible devices in the UK, but fell slightly below target due to issues with one of the four major network providers, Three.

The network failed to send the message to all of its users in England, causing a significant drop-off in numbers.

However, Three was "hugely cooperative" in resolving the issues, and the system is now ready for use.

The emergency alert system, which includes a loud 10-second noise and vibration, is used to warn people about national emergencies such as natural disasters and terrorist attacks.

The system was built and tested after years of delay due to a lack of funding.

The government is now considering testing the system every two years to keep the technology operating smoothly.

In conclusion, the UK's first emergency alert test was a success, with the system reaching a large percentage of compatible devices.

However, there were issues with one of the network providers that caused a drop-off in numbers.

The government is now considering testing the system every two years to ensure the technology is operating effectively.