Government plans to test out an emergency phone siren could cause chaos on the roads as drivers become startled by the alert, ministers have been told.
The siren and message are due to flash up on people's screens on Sunday, April 23, with their phones locked until they acknowledge the warning.
But discussions are now having to be held with the transport sector, domestic violence charities and sporting officials as well as the police, fire and ambulance services about the trial.
