Agriculture in the United Kingdom fund the purchase as a mortgage. The Council could not refuse without the Minister of Agriculture's permission. In 1919 the Board of Agriculture and the Ministry of Food were merged to form the Ministry of Agriculture and Fisheries, which later became the Ministry of Agriculture, Fisheries and Food (MAFF). MAFF was in turn the predecessor of DEFRA. Before the Second World War started, Britain imported 55 million tons of food a year. By the end of 1939, this had dropped to 12 million, and food rationing was introduced at the start of 1940. It did not completely end until July
Rationing limited diet, while simulating the strenuous wartime physical work Britons would likely have to perform. The scientists found that the subjects' health and performance remained very good after three months. They also headed the first ever mandated addition of vitamins and mineral to food, beginning with adding calcium to bread. Their work became the basis of the wartime austerity diet promoted by the Minister of Food Lord Woolton. Britons' actual wartime diet was never as severe as in the Cambridge study because imports from America successfully avoided the U-boats, but rationing improved the health of British people; infant mortality declined