Trains were delayed between Sussex and London after a dog owner tried to climb on to a railway track to rescue his pet.

A spokesman for Sussex Police said they were called to Haywards Heath station after a man "indicated strongly" that he would climb down to retrieve the dog.

A Southeastern spokeswoman said they believed the animal had been hit by a train at the entrance to a tunnel.

The man was escorted from the railway station by officers.

People travelling between London and Haywards Heath, Eastbourne, Littlehampton, Brighton and Ore on Monday evening were affected.