Throughout the Second World War, food and other necessities (e.g. clothing and fuel) were rationed in many countries, with the aim of allocating scarce resources and avoiding waste. The end of the war did not bring about immediate abundance of food, and rationing continued in some countries, in the UK till 1954.
Food in England, black-and-white-photograph, 1943, unknown photographer; source: Library of Congress Prints & Photographs Division Washington, DC. Public domain.