The DruidsStapleWood (DSW) series is a circular route of 69 caches set over a distance of 24km/15 miles.
Full details can be found on the main log page at #01 – DSW – Lych Gate GC5PQR4
Not at the posted coords but not far away.
Puzzle:
511362108600189939076511243388900185558611
08468379910834235744
5108356000151311551073864001531862