The incident took place just after midnight on the morning of Saturday 14 May 2022.
A man and a woman in their 20s were involved in a verbal exchange with an unknown woman before continuing to walk along the road. A few moments later, a vehicle, thought to be a black Land Rover Freelander, stopped and four men got out. It is at this point that the man and woman were assaulted.
The woman sustained minor injuries and the man was taken to a local hospital with serious injuries to his face.
Officers are carrying out enquiries in the area and reviewing all CCTV available.
Anyone who was in the high street at the time of the incident and who saw what happened, or noticed something suspicious in the moments leading up to the assault, should call Kent Police on 01843 222289 quoting reference 46/91370/22.
Alternatively call Crimestoppers anonymously on 0800 555 111 or use the anonymous form on their website.