The Labour Party came to power at the 1945 general election, pledging to bring several industries into state ownership. In 1946, it put the first steel development plan into practice with the aim of increasing capacity. It passed the Iron and Steel Act 1949, which meant nationalisation of the industry, as the government bought out the shareholders, and created the Iron and Steel Corporation of Great Britain. American Marshall Plan aid in 1948–50 reinforced modernisation efforts and provided funding for them. However, the nationalisation was reversed by the Conservative government after 1952.