An air ambulance helicopter landed in Sworders Field, Bishop's Stortford, this evening.It touched down near the children's play area shortly after 7pm.An ambulance and fast response vehicle were already on the scene - parked in nearby Castle View, off the Causeway.A spokeswoman for the East of England Ambulance Service said it received a call about 6.20pm to a private home in Hockerill Street where a man, aged between 50 and 70, had suffered a head injury.
