Southern Rail Derailment Near Lewes Injures 20, Halts Cross-Country Services
A Southern train derailed near Lewes station in East Sussex at around 3:54pm BST on 13 August 2026, with three carriages of the eight-car service overturning onto their sides beside the line. The train, running from London Victoria to Eastbourne, was carrying roughly 110 passengers in its rear carriages when it left the tracks.
Two passengers were seriously injured and 18 others suffered cuts and bruises, according to South East Coast Ambulance Service, which sent more than 20 ambulances and three air ambulances to the scene. East Sussex Fire and Rescue Service dispatched ten fire engines and a command support unit.
Network Rail and Southern Rail issued a joint statement confirming they are working with emergency services and government to manage the response. Southern warned of extensive disruption across its network, with the Lewes-Haywards Heath line still closed and rail-replacement buses in operation through the weekend; no timeline for full service restoration has been given. By 14 August, all 18 passengers with minor injuries had been discharged, and British Transport Police said the two seriously injured passengers were not in a life-threatening condition.
RAIB's preliminary findings, published in an interim update, point to a defect in the track structure that may have been aggravated by sustained hot, dry weather -- ambient temperatures were around 27C on the day of the derailment. Passengers on other services reported experiencing rough riding over the same stretch of track in the period beforehand. RAIB's investigation puts the total injury count at 30, with 20 people requiring hospital treatment, some with serious injuries. The agency has not yet published its full report or final conclusions, and the investigation into the precise sequence of events, including why the defect was not caught sooner, remains ongoing.