Disruption to between Streatham and Tulse Hill expected until 10:00 

Route(s) affected

Southern between London Bridge and Selhurst / East Croydon / Sutton

Thameslink between Luton / St Albans Abbey / West Hampstead Thameslink / Kentish Town and Sutton

Description

A fault with the signalling system between Streatham and Tulse Hill means that trains have to run at a reduced speed on the line towards Tulse Hill. As a result, trains running between these stations may be revised to not run between Selhurst and Tulse Hill.

This is expected until 10:00.

Customer advice:

Disruption is expected, due to a signalling fault near Streatham. This is affecting Northbound trains.

If you are looking to travel or are currently travelling you may experience some disruption. Please allow at least an additional 15 minutes time to complete your journey.

Service alterations:

The following changes to services are expected:

• Services that normally run from East Croydon to London Bridge via Tulse Hill, will divert via Crystal Palace. If you require stations between Selhurst and Streatham, you will need to circulate at Tulse Hill for Southbound services. This will affect Northbound trains only

For the latest information, please check online journey planners and live departure boards or speak to station staff.

Planning your journey:

For help planning your journey, check live departure boards, view a live network map or see alternative route guides.

If you’re travelling within London, you can use the TfL Journey Planner.

Stay up to date on the move with Southern’s WhatsApp channel. Live updates are available Monday to Friday, 07:00–21:00.

Can you tell me more about the incident?

Trains may be delayed due to a fault with a signal in this area. In this case, the signal has become damaged, which means that trains need to run at a reduced speed in the affected area.

Railway signals are designed to warn drivers that they have to stop because the system can't yet confirm that the route ahead is clear. In most places, the signalling system will show a green light, or aspect, when the track is clear for a long distance ahead, and drivers will then be shown one or two yellow lights to warn them when they are approaching a red signal. This means that they can anticipate the amount of braking that's required to stop before they reach another train or any form of problem on the line.

Signalling runs on "fail safe" principles, so if the signals can't step through the usual colours, they will instead show a more restrictive colour - for example, yellow instead of green. This means drivers will be expecting to come to a stop, but in fact, the route ahead may still be clear. This leads to delays whilst trains proceed more slowly than usual.

The signalling system is maintained by Network Rail, and wok is being done with them to diagnose the fault and make sure it is fixed as quickly as possible.

Check before you travel:

You can check your journey using the National Rail 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.