In the South Yorkshire area most of the lines were colliery branches, where the companies joined forces to tap the coal measures and gain a foothold in the lucrative traffic.
Sheffield to Retford line northwards to an end-on junction with the Great Central, Hull & Barnsley and Midland Joint Railway Committee at Braithwell Junction, north of Dinnington Colliery.
This was incorporated into the Rotherham, Maltby and Laughton Railway, which became a constituent of the G.C.
[1] Also included in the joint committee were short curves linking the partners lines.
From Ashburys Junction, on the Woodhead Line, to New Mills where a branch line took the Great Central to Hayfield whilst the main section went to New Mills South Junction and joined the Midland line to Derby or Sheffield, via Chinley.