UK Cell Broadcast – Public Warning System – Flood Warning System

Public trial planned for later this year.

Testing and trial is with EE. O2, Vodafone and Three are ongoing.

Will be available on 2G, 3G, 4G and also 5G.

The Flood Warning System is multi-channel, is possibles send warnings to go out via multiple channels.

In the UK a large number of phones are already enabled.

iPhone Cell Broadcast Message


Android Cell Broadcast Message


Source: and

Emergency Alerting in England – Warning simulation exercise (Cell Broadcast Trials 2019)