A passenger train collision north of London on Friday resulted in one fatality and dozens of injuries, according to UK emergency services. Eleven individuals are reported to be in very serious condition. The incident involved two passenger trains and prompted a large-scale emergency response. Authorities are currently investigating the cause of the collision, but details remain limited. Emergency services are continuing to work at the scene to extract passengers and provide medical assistance. The crash has caused significant disruption to rail services in the area, with cancellations and delays expected throughout the day. Further updates will be provided as the investigation progresses and more information becomes available.