Full military powers, I think. And undoubtedly needed. This is the first set of orders from Battalion HQ at Aldridge to my father's Little Aston Platoon received at 23.15 on July 5th, 1940:
Information.
Reliable reports state that attack on this country is imminent. Attack may take the form of intensive aerial bombardment, landing by paratroops or landings from troop-carrying planes, and attack by sea.
Intention.
(a) Companies will obtain and report definite information of any such attempt.
(b) Companies will pin down, defeat and destroy any enemy who may land, by active attack with every weapon available, whether lethal or improvised. Defence will always be active.
Method.
2(b) does not mean attacks by small patrols and/or posts on large posts of enemy, but by surprise effect of controlled fire from carefully pre-selected positions. The observation posts, patrol posts and barriers, will be defended with vigour and determination.
There must not be and will not be any question of retirement.
No thoughts of future litigation/Courts of Enquiry/prosecutions at THAT moment!
Chris