# Southern Rail train derailment in East Sussex

> Live situation record from CLSTR: https://clstr.news/situations/southern-rail-train-derailment-in-east-sussex
> Updated: 2026-08-14T03:49:48.000Z. Sources: 89. Developments: 2.

A Southern Rail passenger train derailed near Lewes in East Sussex, England, on a Thursday afternoon. The train, traveling from London Victoria to Eastbourne with approximately 150 passengers on board, saw at least three carriages derail and overturn on their sides between Haywards Heath and Lewes.

British Transport Police declared a major incident, triggering a large-scale emergency response involving fire crews, police, and numerous ambulances. While all passengers were successfully evacuated, the accident resulted in multiple injuries. Reports indicate that between 18 and 20 people were treated for injuries, including two individuals who sustained serious injuries and were transported to major trauma centers. Authorities stated that the conditions of those seriously injured were not deemed life-threatening.

The Rail Accident Investigation Branch (RAIB) has been deployed to investigate the cause. The derailment has caused significant disruption to rail services and the closure of several lines in the region. While the exact cause remains under investigation, reports suggest that extreme heat may have contributed to the incident, with temperatures reaching 38.1 degrees Celsius, potentially causing track expansion or defects. Transport Secretary Heidi Alexander has expressed “deep concern” regarding the incident.

## Claims

- Approximately 150 passengers were on board the train at the time of the accident. (corroborated by 23 sources)
- Two people sustained serious injuries and nine others sustained less serious injuries. (corroborated by 19 sources)
- At least three carriages derailed and overturned on their sides. (corroborated by 17 sources)
- The derailed train was a Southern Rail service traveling from London Victoria to Eastbourne. (corroborated by 16 sources)
- The derailment occurred between Haywards Heath and Lewes. (corroborated by 14 sources)
- All passengers on the train were safely evacuated. (corroborated by 13 sources)
- The Rail Accident Investigation Branch has been called to investigate the cause of the derailment. (corroborated by 13 sources)
- The British Transport Police declared a major incident following the derailment. (corroborated by 12 sources)

## Timeline

### 2026-08-14: Transport accidents in Hungary and the UK cause multiple injuries

Multiple transport accidents in Hungary and the UK have left several people injured, including a minibus crash in Izsák and a passenger train derailment near Lewes.

2 sources. https://clstr.news/cluster/transport-accidents-in-hungary-and-the-uk-cause-multiple-injuries

### 2026-08-13: East Sussex train derailment injures 18 people near Lewes

A Southern Rail train derailed near Lewes, East Sussex, injuring approximately 18-20 people, including two seriously. All 150 passengers were evacuated safely, and an investigation is underway.

87 sources. https://clstr.news/cluster/train-derailment-near-lewes-station-in-east-sussex

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Cite as: Southern Rail train derailment in East Sussex. CLSTR, https://clstr.news/situations/southern-rail-train-derailment-in-east-sussex