Members of the RMT trade union employed by Network Rail will stage a 24-hour strike from 17:00 on Thursday 4th June, and a 48-hour strike from 17:00 on Tuesday 9th June.
Should the industrial action go ahead there is likely to be severe disruption to rail services.
Special arrangements are being put in place to ensure that customers who already have tickets are not disadvantaged.
We are working closely with Network Rail on contingency arrangements and further information will be made available shortly.
More information will be published as soon as it becomes available.