Southern have announced plans for their services, should ASLEF go ahead with their overtime ban on Thursday (29 June).
A revised timetable will be put in place, which the firm says will operate 75% of its weekday services on Thursday and Friday, with the view to improving on this from Monday 3 July.
Southern Passenger Services Director Angie Doll said, “This action is going to be very inconvenient to our passengers and communities but by putting in this revised timetable we will be able to run a more reliable and consistent service.
“We've been safely running our trains with drivers closing the doors on additional routes since January and have had six months of sustained improvement in service levels and positive passenger feedback.
“We urge ASLEF to put an end to their industrial action and allow passengers to get on with their lives.”