Dates Mystery Cache

As you would expect, you will not find the cache at the published coordinates but you could get a nice bacon sarnie & a brew.

You will be looking for a 35mm Magnetic film pot.  I have set the 'D' rating at 2.5 for the moment, you never know I may have to increase or even decrease it.

Just a random set of dates for you to play around with.

A = 25/04/1954

B = 23/05/1959

C = 18/06/1964

D = 03/07/1978

E = 03/01/1979

F = 09/02/1980

G = 16/09/1984

H = 09/03/1987

J = 01/01/2004

K = 17/08/2011

You need to find a single digit for A to K and then you will be able to find the cache at:

N51 24.(H+D-C) (J+G) (K+J)

E000 23.(E/D) (A-(B+G)) (G-F) 

Happy hunting.

Congrats to GeoCotch on the First to Find, it's just a shame that the First to Solve has not been able to get out to it.