The cache is at N45 26.ABC, W075 41.DEF
A = The day in September 1916 for which Cpl. Leo Clarke was awarded the Victoria Cross = A
B = How many Guards were killed at the Battle of Cut Knife Hill = B
C = Add together the two digits of the G.G.F.G.'s numerical prefix used in World War II = C
D = The number of Victoria Crosses awarded to the Guards in World War I = D
E = Add together the two digits of the number of Battle Honours carried on the Regimental Colours = E
F = The last digit of the day in October 1916 on which Cpl. Leo Clarke was killed in action = F
The cache has a military theme, so try to bring along any militaria you possess.
You can check your answers for this puzzle on Geochecker.com.
CIVITAS ET PRINCEPS CURA NOSTRA