Traffic was halted on the major trunk motorway at about midday on Friday, August 7, because of a serious collision. An air ambulance attended the scene of the crash (stock image) (Image: Thames Valley Air Ambulance)READ MORE: M40 closed with two hour delays due to 'serious' crashCars experienced delays in excess of two hours on the northbound approach, with six miles of congestion reported, as well as significant delays on the A34 towards the Wendlebury Interchange and junction with the M40. Traffic being diverted off the M40 as the motorway was closed due to the crash (Image: National Highways)Thames Valley Police's rural crime taskforce, which frequently patrols the countryside across the north of Oxfordshire, have now revealed its officers were the first on the scene. A spokesperson said they provided 'an immediate response and support to those invovled' and it is understood other emergency responders subsequently attended the scene. It was described as a 'proactive day highlighting the wide range of incidents Rural Crime Taskforce officers respond to across the force area' by the team.