At the above co-ordinates you will need to find:
The telephone box number: 01451 A B C 201
The Post Box Ref. Number: GL5 D E F
The cache can be found at:
N 51 54 . ( B - F ) ( D + E ) ( B + E )
W 001 54 . ( A - D - E ) ( B + D ) ( C + F )
The Fine Pair series was originally started by wizardsmum.
If anybody would like to place 'A Fine Pair' of their own please do, I would just ask that you let mattd2k at email@example.com know first so he can keep track of the numbers and locations to avoid duplication.
He also keeps a public Bookmark List of this series so once your cache is published please contact him via his profile page to have yours added.