Some rail lines blocked between Haywards Heath and Lewes due to safety inspection of track

As a result, trains may be cancelled or delayed, Southern said. This is expected until 7pm, according to Southern.

A statement on Southern’s website said: “We had been informed of a potential track defect near Plumpton.

“This has now been confirmed as a buckled rail which means services cannot currently run from Lewes towards Haywards Heath.

“Specialist teams from Network Rail are on their way to investigate and expected to be on site at 18:00.”

To see if your journey has been affected, please click here for a live journey map.

If you are at a staffed station please speak to station staff for more information, if you are at an unstaffed station please push the help point for information.