Southern Railway guards are to go on strike for 14 days, the RMT union said this afternoon (Thursday 22 September).
The union said that there would be five separate strikes starting from next month as it steps up its campaign against proposed changes to the role of conductors.
Southern wants drivers to shut the door on new trains as they do on other parts of the network but the RMT said that driver-only operation (DOO) was less safe.
The company said that it would not be making any staff redundant but giving them a slightly different role as onboard supervisors.
Older trains rely on a guard or conductor to close the doors and services are cancelled when there is no guard. Under the proposed changes they would not normally run without an onboard supervisor but could do so, leading to union concerns that jobs will be at risk in future.