A van driver has been arrested following a crash on the A350 at Lacock.
Emergency services were called to the busy road following a road traffic collision involving a vehicle and a pedestrian at around 8.45am today (Thursday).
The incident involved a white Mercedes-Benz Sprinter Luton and a woman aged in her 70s – with Great Western Air Ambulance deployed to the scene.
The pedestrian sustained signficiant injuries and was rushed to the Major Trauma Centre at Southmead Hospital in Bristol in a life-threatening condition.
The driver of the van, a 39-year-old man, has been arrested on suspicion of drug driving and causing serious injury by careless driving.
He has been taken into custody for questioning, Wiltshire Police confirmed.
A spokesperson for the force said: “The road is currently closed while an investigation is carried out.
“Any witnesses to the collision or anyone who may have dash cam are asked to contact the Serious Collision Investigation Team on 01225 694597 quoting log number 88 of today’s date.
“Alternatively, they can contact the team directly at [email protected].”
