Northern has written to the RMT inviting it to recommence ACAS talks.
Northern spokesperson said: “Northern has invited RMT to talks at ACAS in order to resolve its dispute. We are pleased that RMT has agreed to recommence talks at ACAS with no pre-conditions and we look forward to resolving this long-running dispute. Those talks can build on recent public statements made by Transport for the North and Department for Transport on the customer service and other benefits that will come about with a second person retained on Northern services in the future.
"We want to make it clear to customers that the timetable for tomorrow, Saturday 01/12/18, cannot now be changed because it takes a number of days to reinstate a normal timetable. Regardless of whether or RMT continues its dispute tomorrow, the Northern service tomorrow will be the revised timetable of around 700 services, between 8am – 5pm.”