A Rail Delivery Group spokesperson said: “It is encouraging that TSSA members will now have their say on our proposals. We hope that our TSSA colleagues will deliberate carefully, vote for the deal and end this dispute.

“We listened to the union’s concerns in response to our initial offer and we have addressed them – including increasing our offer on pay. If they vote yes, TSSA members’ pay will increase by at least 9% over two years – rising to 13% for the lowest paid.

“Having negotiated at length with the TSSA to agree this best and final offer, we hope that our colleagues look carefully at what is on the table and work with us to bring an end to this dispute. We can then work together to secure a thriving long-term future for a railway we can all be proud of.”