How Britain’s railways are struggling in the heat – and can they be fixed?

Problems including derailments have hit network during one of the hottest and driest summers on record Britain’s railways have faced a string of heat-related problems this summer, including a derailment near Lewes in East Sussex two weeks ago that injured 30 people, and another the next day when the rear carriages of a Greater Anglia train derailed “in an upright position” at Wickford railway…