Only Connect #63 Mystery Cache

Number 63 of the Only Connect series of puzzle caches. The published coordinates are not those of the cache. Solve the puzzle to find them and they lead to a magnetic BYOP final. The cache itself can be found at an appropriate final location, where you will need to prime yourself for maximum stealth.

You may elect to view the rest of the series by clicking on this link to the Only Connect bookmark list.

Something a little bit different to the others in the series. Say what you see.......when you have identified A to F and how they are connected, it should be a straightforward task to identify one surname for each one. As a final task, I'd like you to identify what would be the next in the sequence after F (G, it has three words) and its associated surname.

H=the total word value of the surname associated with A (A=1 ... Z=26).

I=the total word value of the surname .... B.

J=the total word value of the surname .... C.

K=the total word value of the surname .... D.

L=the total word value of the surname .... E.

M=the total word value of the surname .... F.

N=the total word value of the surname .... G.

P=the number of letters in that which would be G.

The cache can be found at : N54 59.Y W001 37.Z

Where Y = L x P + I + K - N - H and Z = N x P + J + I - M - L

You can check your answers for this puzzle on GeoChecker.com.