A communication alarm being activated on a train between London St Pancras International and London Blackfriars means trains running between these stations may be delayed by up to 20 minutes or revised.
Disruption is expected until 16:00.
Customer advice
You can continue to travel using your normal route, but your journey may take up to 20 minutes longer than usual.
Please check journey planners and station information boards before you travel, and allow extra time to reach your destination.
Check the live map here to see if your journey has been affected.
Can you tell me more about the incident?
Earlier today a passenger alarm was activated on a train at London St Pancras. While the driver investigated and reset the alarm, their train was unable to move forwards and blocked the route through London St Pancras southbound towards London Blackfriars.
The alarm has now been reset, and trains can again move through the area, but some trains remain delayed roughly 20 minutes.
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.