The collision, which involved a blue Nissan Qashqai and a black Honda XL-125 motorcycle, happened at around 4.25pm on Sunday 28 July 2024.
The incident took place on the coastbound carriageway prior to the junction for the M25. The motorcyclist, a man in his 20s, was treated at the scene and then taken to hospital, where he remains in a serious but stable condition.
Investigators have spoken to a number of witnesses but would like to hear from anyone who has not yet spoken to the police. In particular, they are urging drivers with dashcam to check for footage that may assist their enquiries. Anyone with information should call 01622 798538, quoting reference 28-0916.
