The cache is not at the published co-ordinates.
The location can be obtained by completing a stage of the Stourbridge Lion Adventure Lab series
Using the answer obtained in format S/S A-/B---
The cache can be found at N52 27.B64 W 002 09.0A4
Once you have signed the cache take a look at the concrete plaque above the door to number 51 and note the date.