A spokesman for Northern said: “As our modernisation proposals are still in the early stages, it is a shame that RMT has announced strike action for Monday 13 March. Our aim is to reach a constructive resolution and we urge RMT to continue the talks we have already started.
“We want to protect jobs and pay, and during our recent discussions we offered to consult fully with our people, customers and key stakeholders.
“If strike action goes ahead, our customers can be reassured that we have plans in place to keep them moving. During any strike action, we plan to run a revised service and will shortly release further information.”