There is also a Church Micro in Warnham (#20 so one of the originals!), a Cricket Pitch Micro (#23) near the given parking coordinates, and a few caches named after cartoon characters which you can collect in between these ones. Note: some paths can get very muddy at times so appropriate footwear recommended.
There is plenty of parking on street in Warnham or at the Village Hall (see Additional Waypoint at #1).
The largest container on the circuit (hence The Big One).