Buller is convinced any pickup in the economy will be felt by warehouse and distribution-center landlords a year or two more quickly than it will be by landlords downtown.

FORBES: Ride The Realty Slump In Style

The second of Eliza Manningham-Buller's Reith Lectures, which is entitled Security, will be broadcast on BBC Radio 4 on Tuesday, 13 September.

BBC: Former MI5 head: Torture is 'wrong and never justified'