The cache is not at the above coordinates. You knew that. The coordinates point to the middle of a roundabout. Do not go there.
Look at my geocaching 'handle'. You will not be surprised that my real name is Martin. But what are the numbers?
They are not random, or an old telephone number, or a date.
Find out what they are.
The date of the hide, 5/8/13, is significant (unless you are American).
The cache is at N52 37.abc W001 06.def, where
abc are the first three digits of F(45)
and
def are the 16th, 17th and 18th digits of F(103)
The numbers do get a bit big! Either use a spreadsheet (but note that Excel doesn't work for numbers this big without some tweaking), or someone else's calculation from the Internet.
To check you are on the right lines the second third and fourth digits of F(20) are 765.
Please check your answer on geocheck, where there is more information:
You might also enjoy: GC59QR5 Oh My Ears and Whiskers
Congratulations to:
OnlyMeUK on FTF
S&S Green on STF
And the prize for the most amusing log so far goes to...
uk_searcher
Well done to all the solvers and finders!