Was the terrifying Sussex train crash caused by the heatwave? Passenger carriages came off 'buckling track in extreme heat' in Lewes, transport expert says

A Greater Anglia train has derailed near Wickford in Essex this afternoon, less than 24 hours after a similar incident in Sussex

The eight-carriage train came off the line between Haywards Heath and Lewes at around 3.54pm this afternoon, with services set to be cancelled until 10pm.