Dashcam footage and witnesses are sought following a serious collision on the A21 between Lamberhurst and Flimwell.
The collision was at a junction with Rosemary Lane and involved a black Harley-Davidson motorcycle and a black VW Polo. It happened at around 3pm on Sunday 4 June.
Police and ambulance crews attended and the motorcyclist, a man in his 60s, was airlifted to a London hospital where he remains in a critical condition. A female pillion passenger, also in her 60s, was taken to the same hospital but has since been discharged.
Officers are appealing to anyone who saw the collision, or either of the vehicles in the moments leading up to it, to contact them. Motorists with dashcams are also asked to check for any important footage. You can provide information by calling Kent Police on 01622 798538 and quoting reference 46/99396/23, or by emailing 46030602@kent.police.uk.