"The truth is plain to everyone."
If the Security Services released specified the details of the contents of their data-bases the wouldn't be very 'secure' - would they? - pratt!
As I said, easily solved - show where they have specified who is on their lists.
I really would take a peep at Stella Rimington's memoirs, 'Open Secret' - makes fascinating reading and shows us just how 'private' our private' lives are.