Leaders of the biggest rail workers' union have held a "productive" meeting with Liverpool's Metro Mayor in a bid to resolve a dispute over driver-only trains.
The meeting between Steve Rotheram came a day after the latest 24-hour strike by members of the Rail, Maritime and Transport union (RMT).
RMT general secretary Mick Cash said: "We have had a productive meeting today and there was a full and frank exchange of views and information.
"Both sides agreed to continue the dialogue and we will reconvene within the next six weeks."
- Video report by Elaine Willcox
Commuters are being warned of significant disruption tomorrow as Northern Rail workers walk out on strike for the third time. Unions claim they have strong public support in the dispute over plans to introduce driver only trains by 2020.