A joint railway is a railway operating under the control of more than one railway company: those companies very often supplying the traction over the railway. United Kingdom There are many examples of joint railway working in the United Kingdom. The more important ones included: Midland and Great Northern Joint Railway (M&GN): Midland Railway and Great Northern Railway (MR/GNR), latterly London and North Eastern Railway and London, Midland and Scottish Railway (LNER/LMS). This was the UK's biggest joint railway system at and operated with its own locomotives and rolling stock. The system stretched mainly east-west from Great Yarmouth via South Lynn to Bourne and Peterborough and thence via the parent companies' systems to Leicester and the Midlands and to London King's Cross. A north-south route ran from Norwich City to Cromer. The two routes crossed at Melton Constable, the joint railway's main engineering centre. Cheshire Lines Committee: Great Northern, Great Central and Midland Railways (GNR/GCR/MidR), operated with its own rolling stock. Great Northern and Great Eastern Joint Railway: the Great Northern and Great Eastern Railways. From Huntingdon and Spalding to Doncaster, with a branch to Ramsey. Somerset and Dorset Joint Railway: London and South Western Railway (LSWR) and Midland Railway. operated, with its own locomotives and rolling stock until 1930. East London Railway: the Great Eastern, London, Brighton and South Coast, South Eastern and Chatham, Metropolitan and District Railways (GER/LBSCR/SE&CR/MetR/District) Metropolitan and Great Central Joint Committee: the Metropolitan and Great Central Railways Manchester South Junction and Altrincham Railway: LNWR/GCR. . Electrified in 1931 Portpatrick and Wigtownshire Joint Railway: the Caledonian, Glasgow and South Western, London and North Western and Midland Railways. Preston and Wyre Joint Railway: L&YR/LNWR. Great Western and Great Central Railways Joint Committee: the Great Western and Great Central Railways. Severn and Wye Joint Railway: Great Western Railway and Midland Railway. Shrewsbury and Hereford Railway: the Great Western and London and North Western Railways. Shrewsbury and Wellington Railway: the Great Western and London and North Western Railways. South Yorkshire Joint Railway: GCR/GNR/L&YR/MidR/NER. Furness and Midland Joint Railway: Metropolitan and Metropolitan District Joint Committee: Metropolitan and Metropolitan District Railway, Mansion House to Aldgate on the Circle Line. Norfolk and Suffolk Joint Railway (N&S): the Midland and Great Northern and the Great Eastern Railway). There were two stretches of line: the most important ran along the East Anglian coast from Lowestoft to Yarmouth, while a much shorter stretch ran from