Twenty Four ! (Bucks) Mystery Cache

This is a puzzle cache you need to solve at home before venturing out. The above co-ordinates are for the nearest rail station. You can walk to the cache from here, but some may find it a bit of a trek. There is nothing at the station that will help you solve the puzzle. Can get very muddy.

This cache was moved significantly on 2nd August 2009. If you calculated the co-ordinates before this date you will need to recalculate them!

As the cache is now in a completely different location, anyone who found this cache in the old location may log a second find on finding the relocated cache.

You're looking for a particular number, once you have found that number, apply the following to find the co-ordinates of the cache:-

AB = The only sequence of 2 different digits that is repeated within the number.
C  = The eleventh and twelfth digits of this number, multiplyed together.
D = The fourteenth digit of this number.
E  = The number of "0"s in the number divided by the second digit of this number.
F  = The thirteenth digit of this number.
G  = The only digit that does not appear anywhere in this number.
H  = The ninth digit of this number.
J  = The number of times the digit 8 appears in this number.

The cache is located at:-

N51 AB.CDE W000 3F.GHJ

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

There is a National Lottery scratchcard in the cache, this is a prize for the first to find the relocated cache.
Please replace the cache as you found it.
No piles of sticks please!