An earlier operational incident between Haywards Heath and Brighton means trains have to run at a reduced speed on some lines.
As a result, trains may be delayed by up to 15 minutes.
Disruption is expected until 18:30.
Customer advice:
Services running between Haywards Heath and Brighton will be subject to delays of up to 15 minutes.
Trains are able to run, and you can continue to use your normal route, but please allow extra time for your journey this evening.
Please check live departure boards before boarding a service. And you can view the live map here.
Can you tell me more about the incident?
An operational incident is delaying the journey of a train in this area. This refers to a problem which will need to be investigated before the train and its crew can continue.
Teams may need to do this alongside other partners, such as Network Rail, in order to gather all the details we need. This will let us determine that the train can move safely and the railway can reopen for normal use.
The railway operates on a number of "failsafe" systems. This means that if a possible fault or a procedural issue is detected, trains will be stopped, or there will be restrictions on how they can move. In many cases, no issue will have occurred, but services will stop as a precaution. In all cases, however, a thorough investigation will take place before it is decided that the train can move.
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.