Note applies to whole track between Brook Down and Military Road.

Surface =compacted implies good surface even for road bikes, and wiki has "Best sort of ways below paving with asphalt, concrete, paving stones." This track is hard going even on a hybrid bike, with some sections consisting of grass, and others loose stones. Suggest surface=pebblestone and surface=grass for parts. 
Some parts are tracktype=grade4 and grade5 (near bench near note marker, and on section down from golf course to Military Road) rather than grade3 ("Even mixture of hard and soft materials"). 
The bridleway between Freshwater Co-Op and Yarmouth station is probably a good local example of a compacted surface, although that is grade2. 
