Special tool required.
Part of a mini-series of caches; all of which require a (different) special tool. All are on public rights of way.
You need to find an eleven digit mobile phone number starting 07 by looking on the blue sign. If the character is a letter use the convention A = 1, B = 2, C = 3, etc, to convert it into a number.
first digit = third number plus fifth number
second digit = ninth letter on fourth line
third digit = tenth letter on eighth line
fourth digit = first number minus seventh number
fifth digit = sixteenth letter on third line
sixth digit = first letter on tenth line
seventh digit = twelfth number minus eleventh number
eighth digit = second letter on ninth line
ninth digit = fifth letter on twelfth line
tenth digit = first letter on nineteenth line
eleventh digit = fourth letter on third line
Checksum (add all eleven digits together) = 42
You must record your caching name when you find the coordinates of the cache and sign the paper log in the cache to be able to log online as "Found". I reserve the right to delete your online log if you haven't done both of these.
This is a Historic Geocache.