Police are appealing for witnesses after a man died following a collision in Syderstone. The incident occurred at 8.34am on Sunday, on the B1454 in the direction of Docking, when a black Triumph motorcycle left the road. The road was closed while emergency services attended the scene, including fire and ambulance crews and the air ambulance. The motorcyclist, a man in his 50s, was taken to Addenbrooke’s Hospital in Cambridge by air ambulance with life-threatening injuries, He died yesterday. The road reopened at around 2.30pm on Sunday. Officers would like to hear from anyone who may have witn…