In the UK, which of these items was not rationed during WWII but it was after the war?

Rationing in Britain was introduced in January of 1940. The Ministry of Food was the one responsible for overseeing food rationing throughout the country. In line with food austerity, the ministry released a number of leaflets dealing with various categories on food conservation. While some explained what to do or how to use new ingredients like dried eggs, others offered helpful tips on how to get most out of the food being rationed.

Everyone (men, women and children) were each given ration books. Food prices were controlled, set at a standard rate so poorer individuals would still be able to buy the food items that they needed.

Food rationing went on even after WWII had ended. In fact, two food items which never went on ration during the war, bread and potatoes, went on ration after the war. During the summer 1946 continual rain ruined Britain's wheat crop. Bread rationing started during January - March.

During the winter of 1946 - 1947 the United Kingdom had a hard frost and deep snow. The frost destroyed a huge amount of stored potatoes which caused potato rationing to start.