A train derailment occurred near Lewes, East Sussex, when three carriages left the tracks while traveling along an embankment. The incident resulted in 20 people sustaining injuries. Emergency services responded to the scene, and the event has caused widespread service cancellations across the regional rail network throughout the weekend.

Authorities have begun an assessment of the site to determine the factors that led to the carriages leaving the tracks. While the immediate focus remains on the medical care of the injured and the recovery of the train, rail operators have advised passengers to check for updates as the disruption is expected to persist while the track is cleared and safety inspections are completed. There is currently no confirmed timeline for when normal service will resume, as the investigation into the mechanical or environmental causes of the derailment is in its early stages.