The Rail Accident Investigation Branch is a British government agency that independently investigates rail accidents in the United Kingdom and the Channel Tunnel in order to find a cause, not to lay b
Cullen House, office of the RAIB at Farnborough Airport
Lewes derailment
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At 15:54 BST on 13 August 2026, a Southern service train, operated by Greater Thameslink Railway, derailed near Lewes railway station in East Sussex. Three carriages of the train, which was en route t
Rail Accident Investigation Branch
…Bedford train collision, 19 June 2026 (investigation in progress); Lewes derailment, 13 August 2026 (investigation in progress). Road Safety Investigation Branch…
The derailed train, showing the rear three carriages off the track
The derailed 387 304, seen on 18 August.