The Cats Pjamas.
THE CACHE IS NOT AT THIS LOCATION!
This is a bonus cache, the clues can be found in the caches along the circular walk from Antony to St John.
The cache is big enough for swappables and trackables.
The caches can be found in any order.
They are G&N's Den (1), I'm Stumped (2), Oh Come On (3), Grand Old Duke of York (4) and Where's Peppa? (5).
This is the code to solve to get the coordinates of the bonus cache.
Enjoy!