Possible Clues:

• Landing area on a rooftop
• Whirlybird landing place
• Special touchdown point?
• Nerve required to enter place housing choppers? That's here
• Nerve required to enter main landing area
• Landing area supervisor admitting insolence
• Bring chopper down here, smashing part of mouth into skull
• Hospital notice outside big building set up to show emergency landing spot?
• What Boleyn lost, cut by edge where chopper came down