Answer the questions about post codes and work out the cache co-ordinates.
1. A = The post code for the Scottish Parliament is EH9? 1SP
2. B = The post code for "Red Dwarf" is RE1 ?DW
3. C = The post code for Buckingham Palace is SW1A ?AA
4. D = The second number in the post code for Father Christmas. Apparently there are two codes for him, so if one doesn't work, try the other one :)
5. EF There are 1?? postal areas in the UK.
6. G = The eight year programme to post code the whole country started in 196?
The cache is at N50 3C.(B+D)E(A-B-G) W003 3D.(F+C)(G-E)(B-C-E)

You can validate your puzzle solution with certitude.