With each day that passes we live in a world of increasingly high-speed communications – today’s innovations are tomorrow’s history – so let’s cut to the chase! The cache can be found at:
N 51° 45.[ARB7060 x CAN0M1S0 x (ZA6850 - 2)]
W 001° 15.[GBNG181HX] [USNC27944] [NZ8013 + 2]
The following map is key to your final calculation:
Created using Google's Fusion Tables
If you wish to confirm that your coordinates are correct before setting out, here’s a handy GeoChecker.com link.
Being in central Oxford, GZ can of course be a little busy - stealth may be required during work travel hours, in particular. Although the terrain is perfectly accessible for wheelchairs (and pushchairs), note that the cache is hidden at standing head height. Happy caching!