After 1919, control of the railways was returned to the companies, and in 1923, the Railways Act 1921 merged about 120 of Great Britain's railways into four large regional companies. In December 1923, the new companies presented proposals that included some reductions in locomotive men's pay and conditions. Negotiations broke down and ASLEF ordered its members to strike, but the NUR instructed its members – including locomotivemen – to stay at work. After another nine-day strike, ASLEF was victorious, but the disagreement between ASLEF and the NUR left deep division.