A train driver was killed and several passengers injured following a collision between two trains in north London. The incident occurred earlier today, prompting a large emergency response including police, fire and ambulance services. Authorities are currently investigating the cause of the crash, with early reports suggesting a possible signalling failure, though this remains unconfirmed. Multiple passengers were treated at the scene for minor injuries, and a number were transported to local hospitals. Rail services in the area have been severely disrupted, with cancellations and delays expected throughout the day. Transport officials are working to restore services as quickly as possible, but have not yet provided an estimated time for full resumption. An investigation has been launched by the Rail Accident Investigation Branch to determine the full circumstances surrounding the incident.