Here are directions from Eynsford

Meanwhile this is the way we go. Coming from Orpington via Eynsford. Go across the ford(there is a road bridge) turn left After 400 yards or so you will see some white houses and a war memorial (firs right Bower Lane). Go up this for 2.7 miles. You will pass walled house, (security lights etc). Turn right about 200 yards past this.Sign in Hedge says Fox and Hounds. Massive car park, down there (field).
Pub at end of lane.
Fox and Hounds has a thread, but little info on it.