The Great Northern and London and North Western Joint Railway was a joint railway owned by the Great Northern Railway (GNR) and the London and North Western Railway (LNWR) in east Leicestershire.
The joint line started from Welham junction and Drayton junction on the LNWR Rugby and Stamford Railway in the south. These junctions allowed traffic to join from either direction. The lines from these junctions ran north and converged at Hallaton junction and then continued via Melton Mowbray to Stathern junction, where the line split. One branch ran north west and joined the GNR Grantham to Nottingham line at Saxondale junction for access to Nottingham. The other line ran north to Bottesford junction on the same line, where curves allowed through running east towards Grantham or west towards Nottingham.
In connection with the joint line, the LNWR double tracked their previously single track Rugby to Stamford line between Rugby and Seaton and built a new double track line from Seaton to Yarwell junction near Wansford on their Northampton to Peterborough line.