If you are travelling through East Croydon station today you can expect some big delays.

A speed restriction is in place due to a defective track which means that a "large number of services" may be delayed by up to 20 minutes.

Network Rail engineers are currently trying to fix the problem.

In this particular situation the fault has been confirmed as a 'track circuit failure'.

This means the signalling system is unable to automatically verify if the next section of track past the affected signal is clear.

The rail network is designed so that if a signal stops working, trains will stop before they reach it.

Whilst this issue is ongoing, train crew will stop at the affected signal and contact the signalling centre to confirm their location, which at this point the signaller will verbally authorise the driver to continue towards the next signal. This process adds time to every trains journey, which means services can experience short delays.

The delays are expected to last until at least 1pm.