Hmm. The UK has a Freedom of Information request process, much like the US (ie just as neutered). The request would be, essentially: "prove it". The hard part would be putting it in a form likely/able to be answered.
Section 23 of the Freedom of Information Act 2000:[0]
"Information held by a public authority is exempt information if it was directly or indirectly supplied to the public authority by, or relates to [...] the Government Communications Headquarters"
Section 23 of the Freedom of Information Act 2000:[0]
"Information held by a public authority is exempt information if it was directly or indirectly supplied to the public authority by, or relates to [...] the Government Communications Headquarters"
[0]: http://www.legislation.gov.uk/ukpga/2000/36/section/23