‘Check before you travel’ campaign for May 2018 train timetable 
New timetables will be introduced at Thameslink, Great Northern, Southern & Gatwick Express. Passengers who use these services to get to work, school, or anywhere else may be affected as their journey time or pattern is likely to change. It is part of the biggest train timetable change in decades and is necessary to help increase capacity and improve reliability on the busiest part of the UK rail network. Check your new timetable at www.railplan2020.com/timetables