Britain Built Its Top Secret MI6 HQ [video]

HMRC Tax Inspectors have the greatest unsupervised ability to spy on people in the UK, without court orders or warrants, more than the Police or security services will ever have.

You should check out the unmarked tax offices/buildings dotted around the country, they put the security services to shame, but maybe the military and police are the sitting ducks designed to draw attention away from the real spies.