The cache is not at the above coordinates but you will find the information required for the calculation.
The telephone number for Hall Bookings is 01440 ABCDEF
The cache can be found at N52 02.(A-E)(D-F)C, E000 26.(A+B-E)B(D-E-F)
If you would like to add to the Church Micro series yourself then please look here
http://churchmicro.co.uk/
There is also a Church Micro Stats & Information page that can be found at
http://www.15ddv.me.uk/geo/cm/index.html