A multi cache starting at Badchaps Z to A milestone puzzle icon 
GC45XHN and visiting some of the lovely villages in the area. Best done by bicycle around country lanes roughly 7 miles in all.
For further information regarding milestones visit The milestone society website
A few additional caches can be gathered along the route. It can also be done by car with a short walk to the final but some of the additional ones will be harder to get.
Starting at the given coordinates, there is a sign to the right of the milestone showing 3 lines of text, the next location is
N51 31.abc where a = total number of S on sign, b = P's on sign and c = letters in top word.
W 002 12.def. def = the total of this sum.
Distance to Hyde park corner โ distance to Sodbury x number of H on the sign (not the milestone).
This location is another Milestone. you will need information from this stone and the 5 bar gate to the left with a single word on it.
Next location N51 30. abc a=distance to xnmalford, b = distance to Bristol divided by 2, c = number of letters on gate.
W002 14.def d = pucklech โ xnmalford, e =Bristol divided by 2, f =letter T's on sign on gate.
At this location you will need a milestone and information from a 3 way sign to the right.
N51 29.abc a=distance to Chippenham - littleton drew, b= distance to Burton divided by distance to Castle Combe, c= Sodbury
W 002 12. def = total of this sum H.P.C. + (chippenham x 4) + littleton drew then multiply the total by 2
Final is a regular size lock n lock camo'd box on a byway, room for plenty of trackables/swaps.
Congrats to Badchap on FTF!