A signalling problem is causing delays on services between Brighton and Haywards Heath.

This morning rail operators reported problems between Preston Park and Wivelsfield and said commuters may experience long delays until the issue is resolved.

Both Southern Rail and Thameslink warned this could cause delays of up to 60 minutes.

All Lewes to Brighton and Brighton to Lewes shuttle services have also been cancelled.

You can follow updates on the incident on Twitter using #Wivelsfield.

At 12.20pm the operators said delays were now down to 20 minutes.