Vital Organs Multi-Cache
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Difficulty:
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Terrain:
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Size: 
(small)
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This cache will take you on a walk of approximately half a mile. Multiple approaches possible, some more likely to be muddy than others. There's no need to destroy wildlife at the final. Find a way around...
The coordinates above take you to a church belonging to a permanent private hall of Oxford University. Find the Latin inscription and convert the letters into numbers in the time-honoured way (e.g. B=2 but P=6 because you omit the leading digit). This gives you the first part of the final coordinates:
N 51° 4(4th-2nd letter).(13th-15th letter)(3rd letter)(5th+6th letter)
Diagonally opposite of this church, you will see a tree. What's its name (don't worry, not much botanical knowledge needed..)? Convert it into numbers just as described above = ABC.
W 001°A+C.(-B+C+A)(B-C+A)(B-B)
Now off to the Final! It is a camouflaged Lock+Lock box, should be big enough for TBs and Geocoins... 
Initial contents:
logbook + pen
Sport Relief Medal
iTunes key-band
FTF: Stemonitis
Additional Hints
(Decrypt)
Va gur gerr oruvaq gur orapu.