Start at drain at northern end of Woollen Lane just north of Marston Magna Proceed north on A359 to Queen Camel where turn left at the mini RAB onto West Camel Road Proceed to crossroads at NE corner of RNAS Yeovilton where left onto B3151 Pass RNAS to Northover (Ilchester) RAB at the B3151 (there is a very tight circle available here, not apparent on street view, I hand-drew this bit) Retrace past RNAS to crossroads where turn right to finish at 30 sign just at entrance to Queen Camel before the first road on the left (this is in line with the centre of the 30 road marking visible in aerial view).