Extra water will be provided along routes instead of recruits being required to ration their supply or refill bottles from streams.

Make your food stocks last: ration your supply, because it may have to last for 14 days or more.

But just as important as rationing that supply over the coming weeks and months will be choosing which chocolates to eat first.

The shortage caused several fast food chains to stop offering tomatoes unless requested and supermarkets rationed their supplies.