No train services will run on a number of dates in May and June as railway workers take more strike action.
No Thameslink or Great Northern services will be running on Friday, May 12, Wednesday, May 31, and Saturday, June 3, with ASLEF members walking out.
There will also be limited trains on Saturday, May 13, thanks to strike action by the RMT union, with services starting later and finishing earlier than normal.
Some stations will have no service for the entire day.
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Due to a ban on overtime by the ASLEF union, an amended timetable with fewer services will run between Monday, May 15, and Friday, May 19, Saturday, May 20, and on Thursday, June 1.
A spokesperson for Great Northern Rail said: "The amended timetable is to provide greater certainty for customers on train times with fewer short notice alterations.
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"Services are likely to be busier than usual and you may need to queue, so we recommend you allow extra time.
"If you have flexibility on your travel plans, services are normally much quieter on Mondays and Fridays."
To keep up to date with your journeys, go to nationalrail.co.uk/.
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