In response to the approaching closure of the entire branch between Wymondham, Dereham and North Elmham, the Great Eastern Railway (1989) Limited formed to save the line. The F&DRS backed this scheme, and signed its lease of County School station over to the company. The society, renamed the Mid-Norfolk Railway Society in 1990, continued to provide financial backing and manpower for the development of the County School site. The running line was extended over towards North Elmham, and a collection of rolling stock was built up. The first passenger train, a Mk2 brake coach converted to work as a DBSO with an industrial diesel locomotive, operated at the County School site on 2 November 1991.