My first Mystery cache placement - placed on St David's Day (which is completely irrelevant to the cache but is only significant because I'm of Welsh Heritage!)
It should go without saying that the cache is not at the published co-ordinates. You do not need to visit them but it might assist you if you did.
Final is at: N51 AB.CDE W000 FG.HJK
Where :
A=Girls - Abroad
B=Henry + Spying
C=Girls - Camping
D=Abroad - Spying
E=Again Doctor - Doctor
F=Abroad - Henry
G=Dick - Henry - Spying
H=Spying
J=Camping - Doctor
K=Matron - Camping
Checksum for all 10 calculated letters (A-K, omitting I) is 30