Overview
- A Greater Anglia train partially derailed south of Wickford on Friday when rear carriages left the tracks upright; about 40–45 people were on board, no injuries were reported and all lines between Shenfield and Southend Victoria remain blocked while investigators work on site.
- A Southern service from London Victoria to Eastbourne overturned near Lewes on Thursday, with three carriages tipped onto their side, roughly 150 passengers aboard and two people taken to major trauma centres with serious but non‑life‑threatening injuries.
- The Rail Accident Investigation Branch and Network Rail have deployed inspectors to both scenes to gather evidence from track, rolling stock and CCTV and have urged the public not to draw conclusions until formal inquiries report their findings.
- Engineering experts say continuously welded rail can expand and buckle when temperatures rise above the design 'stress‑free' level and Network Rail says unusually hot, dry weather has posed exceptional challenges, though a direct causal link has not been confirmed.
- The Wickford derailment has caused major disruption with nearly 100–150 services cancelled, replacement buses and shuttle timetables in place, and operators warning the route is unlikely to reopen before the end of the weekend, affecting commuters and coastal travel.