A major train collision occurred north of London, resulting in one fatality and 89 injuries. The incident involved two passenger trains and prompted a large-scale emergency response, with over 20 ambulances and helicopters dispatched to the scene. Authorities are currently investigating the cause of the collision, but details remain limited. Emergency services are working to extract passengers and provide medical assistance to the injured. The accident has caused significant disruption to rail services in the area, with lines closed for investigation and recovery efforts. Further updates are expected as the situation develops and the investigation progresses.