The SYJR was a committee formed in 1903, between the Great Central Railway, Great Northern Railway, Lancashire & Yorkshire Railway, Midland Railway and North Eastern Railway to oversee the construction of a new railway in the Doncaster area of South Yorkshire. The five companies had equal rights over the line, each of the companies regularly working trains over it. In the grouping of 1923, the railway became an LMS - LNER joint line.