Is that the secret police state whose powers are set out clearly in public law passed by democratic vote in parliament, who require judicial or similar approval to act beyond their standard warrant badge's powers, who are accountable annually for the exercising of their powers (both legitemate and cock-ups) to parliament who then report their findings (cock ups and all) to us the general public, and whom can go to jail for the mis-use of those powers? Doesn't sound very secret to me...
Anyway, the answer to who is now watching it is the remaining panel members, and parliament. Liberty are now on the outside of it all, which is probably where they're happier being: noisy but excusably ineffectual.
Biting the hand that feeds IT
