Very surprised to see the development today with such a clear photo. The reason I suspect the police are interested in this person is because maybe they can confirm that he does not walk through Womenswold village, so they suspect he exited onto Pond Lane from the woods that road cuts through the next morning, suggesting he may have camped there that night as police presence at Akholt Wood the day before would have made it impossible for him to take that route.
I am not familiar with this area but it seems as odd place to walk if he does not have a car parked somewhere or is going to be collected, as there seems to be little public transport options this direction. Yet if this person really wanted to remain unseen why did they walk along the road and not through the fields.