Edwardian is a bit close to the one they did based on 1900, I'd have thought. First World War would have more possibilities, they had rationing then though it wasn't as well organised. In fact during the Second World War it's said the average standard of nutrition went up. That wasn't true first time round.

But 1940s got everything - close enough to be remembered first or secondhand, far away enough to be exotic, set against a historic narrative that still seems relevant and important.