Editing Midland Main Line (section)

{{Short description|Railway in the UK}}
{{About|the railway line in the UK|the former train operating company|Midland Mainline (train operating company)|other rail lines|Midland Line (disambiguation)}}
{{Use dmy dates|date=March 2021}}
{{Infobox rail line
| name                            = Midland Main Line
| image                           = 222015 EMR Meridian DEMU at Cossington 290224.jpg
| image_width                     = 290px
| caption                         = [[East Midlands Railway]] [[British Rail Class 222|Class 222]] passing [[Cossington, Leicestershire|Cossington]], in 2024
| image_alt                       = Engine with passenger carriages approacing on a left turn flanked by a stand of trees taken from an overbridge
| type                            = [[Inter-city rail|Intercity]], [[commuter rail]],<br>[[regional rail]] and [[Passenger_rail_terminology#United_Kingdom|heavy rail]]
| system                          = [[National Rail]]
| status                          = Operational
| locale                          = {{ubl|[[Greater London]]|[[East of England]]|[[East Midlands]]|[[Yorkshire and the Humber]]}}
| start                           = [[London St Pancras International railway station|London St Pancras]]
| end                             = [[Sheffield railway station|Sheffield]] or [[Nottingham railway station|Nottingham]]
| stations                        = 37
| routes                          = 
| daily_ridership                 = 
| open                            = Stages between 1830s–1860s
| close                           = 
| owner                           = [[Network Rail]]
| operator                        = {{ubl|[[East Midlands Railway]]|[[CrossCountry]]|[[Govia Thameslink Railway|Thameslink]]|[[TransPennine Express]]|[[Northern Trains]]|[[GB Railfreight]]|[[Freightliner Group|Freightliner]]|[[DB Cargo UK|DB Cargo]]|[[Direct Rail Services]]}}
| character                       = 
| depot                           = {{ubl|[[Cricklewood Depot|Cricklewood]]|[[Derby Etches Park]]|[[Nottingham Eastcroft]]|[[Bedford Cauldwell Walk depot]]|[[Toton TMD|Toton]]|Sheffield Station Depot|[[Neville Hill TMD|Neville Hill]]}}
| stock                           = {{ubl|[[British Rail Class 150|Class 150 ''Sprinter'']]|[[British Rail Class 156|Class 156 ''Super Sprinter'']]|[[British Rail Class 158|Class 158 ''Express Sprinter'']]|[[British Rail Class 170|Class 170 ''Turbostar'']]|[[British Rail Class 185|Class 185 ''Desiro'']]|[[British Rail Class 220|Class 220 ''Voyager'']]|[[British Rail Class 221|Class 221 ''Super Voyager'']]|[[British Rail Class 222|Class 222 ''Meridian'']]|[[British Rail Class 360|Class 360 ''Desiro'']]|[[British Rail Class 700|Class 700 ''Desiro City'']]}}
| linelength                      = 
| tracklength                     = 
| tracks                          = 2–4
| load_gauge                      = [[W6 (loading gauge)|W6]]–[[W8 (loading gauge)|W8]],<ref>{{cite web|url=https://www.networkrailmediacentre.co.uk/resources/east-midlands-rus-final|publisher=Network Rail|title=East Midlands RUS Loading Gauge|page=55|access-date=21 August 2010}}</ref> planned upgrade to [[Loading_gauge#Great_Britain|W12]]<ref>{{cite web |title=East Midlands Route Study, 2016 |url=https://www.networkrail.co.uk/wp-content/uploads/2016/12/East-Midlands-Route-Study.pdf |publisher=Network Rail}}</ref>
| gauge                           = {{track gauge|ussg|allk=on}}
| electrification                 = [[25 kV 50 Hz AC]] [[OHLE]]<br>(London St Pancras to Wigston)
| speed                           = Maximum {{convert|125|mph|km/h|0|abbr=on}}
| map                             = [[File:Midland Main Line.png|290px]]<br>([[:commons:File:Midland Main Line.png|Click to expand]])
| map_state                       = uncollapsed
}}
{{Midland Main Line RDT|collapse=no}}
{{Midland New Road|collapse=yes}}

The '''Midland Main Line''' ('''MML'''), sometimes also spelt '''Midland Mainline''',  is a major [[Rail transport in Great Britain|railway line]] from [[London]] to [[Sheffield]] in Yorkshire via the [[East Midlands]]. It comprises the lines from London's [[St Pancras railway station|St Pancras station]] via {{rws|Leicester}}, {{rws|Derby}}/{{stn|Nottingham}} and {{rws|Chesterfield}}.

Express passenger services on the line are operated by [[East Midlands Railway]] (EMR). The line is electrified between St Pancras and Wigston, south of [[Leicester railway station|Leicester]], and the section south of Bedford forms a branch of the northern half of the [[Thameslink|Thameslink network]], with a semi-fast service to [[Brighton railway station|Brighton]] and other suburban services. A northern part of the route, between Derby and Chesterfield, also forms part of the [[Cross Country Route]] operated by [[CrossCountry]]. Tracks from Nottingham to [[Leeds railway station|Leeds]] via [[Barnsley Interchange|Barnsley]] and Sheffield are shared with [[Northern Trains|Northern]]. East Midlands Railway also operates regional and local services using parts of the line.

The Midland Main Line is undergoing a major upgrade of new digital signalling and full line electrification from London to Sheffield.<ref>{{Cite web |url= https://www.networkrail.co.uk/running-the-railway/our-routes/east-midlands/midland-main-line-upgrade |title=Midland Main Line Upgrade |date=July 2022 |publisher= Network Rail}}</ref> [[High Speed 2]] was planned to branch onto the Midland Main Line at [[East Midlands Parkway railway station]].<ref name=IRP>{{Cite web |url= https://www.gov.uk/government/publications/integrated-rail-plan-for-the-north-and-the-midlands |title=Integrated Rail Plan for the North and Midlands |publisher= Department for Transport |date=22 March 2022}}</ref>