The East of England Ambulance Service and East Anglian Air Ambulance were called to Kings Lane, at about 3.20pm following reports of a collision. The fire service was also called to the scene to assist. A spokesman for Cambridgeshire Fire and Rescue said: Firefighters arrived to find a collision had taken place between a car and a moped. They treated two casualties at scene who were then left in the care of ambulance crews. The ambulance service treated the man at the scene before transporting him to Addenbrookes Hospital, in Cambridge, in a serious but stable condition. A second person was treated at the scene for minor injuries.