The posted coordinates are for the Bog Gate, that connects Sheen Common to Richmond Park. You have to solve the puzzle below to find where the cache is located inside Sheen Common.
If you were at least a few years old in the 1970’s or later somewhere in Latin America or even, possibly, the USA and some parts of Europe, you might recognise these guys. Use their names to find the final coordinates.
N51 AB.CDE W000 (A-1)(F+1).G(H+1)(C+1)
Posted with kind permission of Richmond Council.