A section of the M40 has been closed following a serious collision where one car was flipped over in the road.

UPDATE: 57-year-old woman killed in M40 crash

Traffic has come to a standstill on the motorway between Junction 8A and Junction 9, with police, fire and ambulance services on the scene.

The road had been closed completely to allow an air ambulance to land. The southbound carriageway has since been opened to traffic.

Bucks Free Press: The M40 is closed between Junction 8A and Junction 9The M40 is closed between Junction 8A and Junction 9

The incident involved a colission between two cars, where was overturned. The accident was first reported at around 11.15am.

Junction 8A provides access to Aylesbury via the A418, while Junction 9 takes traffic to Bicester and Aylesbury via the A41.

The motorway remains closed northbound while emergency services are on the scene. One lane has been opened to allow trapped traffic through.

Traffic is being diverted via the A40 towards Headington, with drivers urged to follow the 'hollow diamond' road signs.

Drivers have been warned of serious delays and are being encouraged to find alternative routes.