The train drivers’ union Aslef has reached a deal in its dispute with Southern after ten days of talks hosted by the TUC.
The deal will have to be agreed by Aslef members in a vote before it brings an end to industrial action, including strikes.
There is not yet an end to the dispute with the RMT, which represents guards, who have become redesignated as on-board supervisers by the train company.
The dispute centres around the driver-only operation of trains and whether the widely adopted system of running trains is sufficiently safe.
The new system makes train cancellations less likely and is cheaper to staff, with drivers responsible for closing the train doors rather than guards or conductors.
But despite accepting similar changes in the past, the unions continue to express concerns about the safety implications.
They are also angry that Southern’s owner Govia Thameslink Railway (GTR) has imposed the changes rather than brought them in by agreement.