The air ambulance is at the scene of a road traffic collision this afternoon (Wednesday, 13) after a driver was believed to have suffered a medical episode at the wheel in Shoreham. Emergency services were called to the incident at the Holmbush roundabout in Upper Shoreham Road shortly after 12.15pm. Police said a single vehicle is believed to have been involved after its driver suffered a medical episode. Roads feeding into the roundabout have been closed and diversions set up at this time.