I read somewhere that Chuchill asked for mustard gas as well.
Ivan
He didn't have to ask for it. We still had quite a bit, left over from the First War.
Churchill, iirc, specifically authorised its use if it appeared to only way to prevent the Germans from establishing a beachhead. He also cautioned against taking prisoners, saying that if a German appeared to be surrendering, it might well be a ruse, so if in doubt, forget Queensberry rules and just shoot him.
As far as Winston was concerned it was a case of "Anything goes". A Nazi conquest of this country was the ultimate horror, and any measure was justified in order to prevent it. Gentlemanly conduct would just have to go out of the window.
I agree with him.