The photo rang a bell as soon as I saw it. The penny dropped but I decided to hold fire, as I've put a few up lately. I went over the bridge a number of times in the late 60s while repairing Imperial Automatic Washing Machines on a freelance basis. I covered Kent, South London, and Sussex in my minivan.
Later, I crossed the bridge to support our daughter who was doing a charity bungee jump outside the Bull Inn pub at the top of the hill. Later, I crossed it again to attend a nephew's baptism in the Parish Church at the top of the hill. I don't remember noticing the row of huts though.