A serious traffic collision on the M50 motorway southbound between junctions 11 and 12 has left nine people hospitalised, including eight teenagers. The incident involved two vehicles and was caused by a car travelling in the wrong direction. Emergency services responded to the scene and transported the injured to nearby hospitals. The extent of their injuries is currently unknown. Authorities are investigating the cause of the incident and have closed lanes on the M50, causing significant traffic delays. Motorists are advised to avoid the area or expect lengthy congestion. Further updates will be provided as the investigation progresses.