The general election in October 1964 returned a Labour government under Prime Minister Harold Wilson after 13 years of Conservative government. During the election campaign Labour had promised to halt rail closures if elected, but it quickly backtracked, and later oversaw some of the most controversial closures. Tom Fraser was appointed Minister of Transport, but was replaced by Barbara Castle in December 1965. Castle published a map in 1967, "Network for Development", showing the railway system "stabilised" at around 11,000 route miles (17,700 km).