Lewes derailment closes Haywards Heath, Lewes line after 11 injured
Greater Thameslink Railway confirms investigation with Rail Accident Investigation Branch following 13 August incident
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Eleven passengers were injured when a Southern service train derailed near Lewes on 13 August 2026. Two people suffered serious injuries, while nine others sustained less severe harm. Approximately 150 passengers were on board when three carriages toppled onto their side shortly before 4 pm.
The incident has forced the closure of the line between Haywards Heath and Lewes. Greater Thameslink Railway, which operates the service, said disruption is expected to continue until further notice. The company has not provided a timeline for reopening the route.
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Commuters faced widespread disruption during the evening peak on 13 August 2026
Investigation underway
John Whitehurst, chief executive of Greater Thameslink Railway, confirmed that the Rail Accident Investigation Branch (RAIB) is leading the inquiry. Whitehurst told BBC Radio 4’s Today programme that specialist teams are assessing both the train and the track infrastructure.
Whitehurst described the derailment as "incredibly rare" and stated that the railway remains safe. He added that the company follows control processes, including inspections and temporary speed restrictions, to manage risks during extreme weather conditions.
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The train just started jostling, kind of bumping up and down, and then jostling from side to side like a seesaw, and everyone was screaming.
Rachel Heath, passenger
Lucy McAuliffe, Network Rail’s route director for Sussex, said the company is cooperating fully with the RAIB. She stated that investigators are on site to determine the cause of the incident. No details about potential contributing factors have been released.
Impact on travel
Passengers travelling between London Victoria and Eastbourne face significant disruption. Southern Railway has not yet announced alternative transport arrangements, such as replacement bus services. Commuters are advised to check the company’s website or app for real-time updates.
The closure affects residents in Barnet who commute to Sussex for work or leisure. Those planning journeys should allow extra time and consider alternative routes, such as travelling via Brighton or using National Rail services to nearby stations.
What happens next
The RAIB will publish an initial report within weeks, though a full investigation may take several months. Greater Thameslink Railway has not indicated when the line might reopen. Passengers are urged to monitor Southern Railway’s service updates for changes.
Questions this report answers
+How many people were injured in the Lewes derailment?
Eleven passengers were injured when the train derailed near Lewes on 13 August 2026. Two people suffered serious injuries, while nine others sustained less severe harm, as reported by Greater Thameslink Railway.
+When will the Haywards Heath, Lewes line reopen?
Greater Thameslink Railway has not provided a date for reopening the line. The company stated that disruption is expected until further notice, and passengers should check for updates on Southern Railway’s website.
+What caused the Lewes train derailment?
The cause of the derailment is unclear. The Rail Accident Investigation Branch is conducting an inquiry, and Greater Thameslink Railway is assisting with the investigation. No details have been released about potential factors.
+Are there alternative travel options while the line is closed?
Southern Railway has not yet announced replacement bus services or alternative routes. Passengers are advised to check the company’s website or app for updates and consider travelling via Brighton or other nearby stations.
WE FILE
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