Franklin Roosevelt actually said...

Cut your mileage— I don't mean essential mileage to get you to work— cut the rest of your mileage at least in half.

I suppose it will be voluntary, in the sense that if you don't do it— in effect it will be compulsory.

I can say that on the whole it is getting on very well, but that is not terribly exciting.

I think it is a pretty good idea to strike while the iron's hot, and the Lord knows it's hot now.