Police have made a drug driving arrest at the scene of a serious road traffic collision near Chippenham.
Emergency services were called the crash — involving a car and a motorcycle — on the A420 in Corston at around 12.30pm this afternoon.
Wiltshire Air Ambulance landed near the incident so it’s medics could provide critical care to the injured biker. 
It’s not yet clear whether the casualty has suffered serious injuries.
The road is expected to remain closed for several hours.
More follows.
