A trespass incident at Dormans is causing disruption to journeys running between Oxted and East Grinstead.
As a result, trains may be cancelled or delayed.
Disruption is expected until 20:45.
Customer advice:
Southern have recently been told about this incident, and are working to get more information for you.
Your journey is likely to be disrupted, but there isn't an exact estimate for any delays at the moment.
You'll be able to see any further updates on this page, so please continue to check back here.
If you need to use another route, you will be updated shortly.
Planning your journey:
You can see a live map of the network here. This will show where your journey is likely to be affected.
Can you tell me more about the incident?
A trespass incident has been reported in the Dormans area.
At the moment local staff and colleagues at Network Rail are working to assess the situation.
In this case, we've needed to stop trains entirely, as it's not safe to run services past the person. Emergency services and Network Rail responders are attending to make sure the person is removed.
Trespassing on the railway is very dangerous. Trains run all day, every day - whether passenger trains, freight trains or specialist engineering work machines. It's not possible to be sure that you can hear when a train is coming, and in many cases, you won't see a train until it is very close to you.
In many areas, trains are powered by an electric third rail, which carries a dangerous electric current. There are also other electrical systems and cables, slippery surfaces, steep drops and other hazards.
Network Rail manage the railway infrastructure, and they're working hard to educate everyone about these dangers and prevent people from accessing the track. You can see their latest safety campaigns here.
As well as the dangers, trespassing on the railway is also illegal, and obstructing the railway can carry severe penalties.
Check before you travel:
You can check your journey using the National Rail Enquiries real-time Journey Planner.
Compensation:
You may be entitled to compensation if you experience a delay in completing your journey today. Please keep your train ticket and make a note of your journey, as both will be required to support any claim.