During the First World War the cost of living increased rapidly. From July 1914 to September 1915, for example, food prices rose 37%. For the duration of the War, the government was in control of the railways. Wages were increased, but at a slower rate than the rise in the cost of living. NUR and ASLEF responded jointly, and forced the Board of Trade to award wage increases in September 1916 and April 1917. In March 1919, the coalition government indicated that it intended to review the War Wage, with a view to reducing it at the end of the year. The NUR and ASLEF started a second national railway strike in September 1919, which in nine days won both a change in pay policy and the reduction of the working day to eight hours.