Police are appealing for dash cam footage and witnesses
The collision happened at 9.05am on Sunday 11 November 2018 on the B2080 Tenterden Road involving a black Peugeot 107 and a white Mercedes Sprinter mini bus.
Police patrols attended along with the South East Coast Ambulance Service, Kent Fire and Rescue Service and the air ambulance.
A woman was airlifted to a London hospital with a serious leg injury.
Officers from the Serious Collision Investigation Unit are investigating the incident and are appealing for any witnesses who may have seen the car or mini bus before or at the time of the collision, or who have dashcam footage to get in contact.
Witnesses can call the appeal line on 01622 798538 quoting reference RY/MD/156/18.