Prince of Darkness

Mandelson walking along Downing Street with a fairly well known young Holywood actor.
Trying to impress said actor Mandleson says infront of Delta1 outside the front door of number 10.
"This officer is here to protect my life, isn't that right?"
Delta 1 replies," No sir. I'm here to make sure the man who kills you never stands trial".
Mandleson goes quiet.