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Track defect found near derailment site – report

Published August 20, 2026 · Updated August 20, 2026 · By Sandra Lopez - ninoda.com

Foto : Sandra Lopez - ninoda.com

Track Irregularity Identified at Lewes Derailment Location

Ninoda.com – The Rail Accident Investigation Branch has confirmed the presence of a track "irregularity" at the East Sussex site where three carriages plunged down an embankment last Thursday, injuring 30 passengers. Recovery operations remain underway at the scene.

What the Investigation Has Found So Far

According to the RAIB's preliminary findings, footage captured by a passing train's CCTV at 14:04 BST revealed a deviation in track geometry immediately before the point where the derailed service lost contact with the rails. The branch also noted that passengers aboard other trains had filed multiple reports of rough riding at that same stretch of line.

The affected service was the 14:24 departure from London Victoria bound for Eastbourne. Its eight carriages were travelling at roughly 65 mph — inside the 70 mph limit — when the driver initiated braking as the train neared the Landport area of Lewes. At approximately 15:54 BST, the train left the tracks.

Two passengers sustained serious injuries, while 18 more were transported to hospital with lesser wounds. All 18 have since been discharged.

Weather and Embankment Vulnerability

The RAIB update drew attention to a prolonged spell of hot, dry conditions preceding the accident. Temperatures reaching 33 °C (91.4 °F) were recorded shortly before the crash. Investigators noted that the clay embankment and the substrate beneath it respond to shifts in moisture content, potentially shifting as water levels fluctuate.

The ongoing inquiry will now examine how that particular section of track was inspected and maintained, the structural condition of the embankment itself, prevailing weather at the time, and the effectiveness of any hot-weather mitigation protocols in place.

Industry Response

In a joint statement, Lucy McAuliffe, Network Rail's route director for Sussex, and John Whitehurst, chief executive of Greater Thameslink Railway — whose Southern Rail service was involved — expressed regret over the incident.

"We will carefully consider any recommendations arising from the investigation and work across the industry to implement them, with the shared goal of making an already safe railway even safer for our customers, colleagues and the communities we serve."

Earlier that week, Martin Frobisher, Network Rail's group safety and engineering director, told the BBC that speed restrictions had not been imposed along the affected section at the time of the derailment. He maintained the network remained safe and that various measures were in place to manage weather-related effects on track and rolling stock.

The Department for Transport issued its own statement reaffirming that "safety remains the absolute priority across our rail network." It further noted that delays attributable to track faults have fallen by 45 percent since the late 2000s, placing UK railways among the safest in the world.

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