Written order given to two junior liaison officers at GHQ Home Forces:
You are to go to Mill Hill, pick up a Lanchester armoured car and take it to Chequers. The car is for the Prime Minister's use. One of you will ride in front and show your identity card at any road-block where it is required. the other will ride (on motor-cycle) behind the car in case of breakdown. … Do not say the Prime Minister is in the car.