List of constituents of the London, Midland and Scottish Railway

Constituent companies

Caledonian Railway (CalR) 1114.5 route miles (1794 km)
Furness Railway (Furness) 158 miles (254 km)
Glasgow and South Western Railway 493.5 miles (794 km)
Highland Railway(HR) 506 miles (814 km)
London and North Western Railway (LNWR) - with which the Lancashire and Yorkshire Railway (L&YR) had been amalgamated on 1 January 1922. Total route mileage (1923) was 2667.5 miles (4293 km)
Midland Railway (MidR) 2170.75 miles (3473 km)
North Staffordshire Railway (NSR) 220.75 miles (355 km)

Independently operated lines

Cleator and Workington Junction Railway 30.5 miles (49 km) (partially worked by the Furness Railway)
Knott End Railway 11.5 miles (19 km)
Maryport and Carlisle Railway 42.75 miles (68.8 km)
North London Railway 16 miles (26 km) (managed by the LNWR)
Stratford-upon-Avon and Midland Junction Railway 67.5 miles (109 km)
Wirral Railway 13.75 miles (22 km)

Independent lines for which rolling stock was provided by other companies

Non-working companies

Originally leased to or worked by LNWR
- Charnwood Forest Railway 10.5 miles (17 km)
- Dearne Valley Railway 21 miles (34 km)
- Harborne Railway 2.5 miles (4 km)
- Mold and Denbigh Junction Railway 15 miles (24 km)
- Shropshire Union Railways and Canal Company 29.25 miles (47 km) [part of this system was jointly leased with the Great Western Railway (GWR)]
Originally leased to or worked by MidR
- Tottenham and Forest Gate Railway 6 miles (10 km)
- Yorkshire Dales Railway 9 miles (14 km)
Originally leased to or worked by CalR
- Arbroath and Forfar Railway 14.75 miles (24 km)
- Brechin and Edzell District Railway 6.25 miles (10 km)
- Callander and Oban Railway 99.75 miles (161 km)
- Dundee and Newtyle Railway 14.5 miles (23 km)
- Killin Railway 5.25 miles (8 km)
- Lanarkshire and Ayrshire Railway 36.25 miles (58 km)
- Solway Junction Railway 12.25 miles (20 km)
Originally leased to or worked by HR
- Dornoch Light Railway 7.75 miles (12 km)
- Wick and Lybster Light Railway 13.5 miles (22 km)
Originally leased to or worked by NSR
- Leek and Manifold Valley Light Railway (narrow gauge) 8.25 miles (13 km)
Originally leased to or worked by several component companies
- North & South Western Junction Railway 5.25 miles (8 km)
- Portpatrick and Wigtownshire Joint Railway 82.25 miles (132 km)

Carlisle Citadel Station and Goods Traffic Joint Committees (originally joint owned by various companies)
were LNW/MidR joint:
- Ashby and Nuneaton Railway 29.25 miles (47 km)
- Enderby Railway 2.25 miles (4 km)
were LNW/L&YR joint:
- Lancashire Union Railway 12.75 miles (21 km)
- North Union Railway 6.5 miles (10 km)
- Preston and Longridge Railway 8 miles (13 km)
- Preston and Wyre Joint Railway 46 miles (74 km)
was Furness/MidR joint
- Furness and Midland Joint Railway 9.75 miles (16 km)
was Furness/LNWR joint
- Whitehaven Cleator and Egremont Railway 35 miles (56 km)
were Cal/GSW joint
- Glasgow, Barrhead and Kilmarnock Joint Railway 29.75 miles (48 km)
- Glasgow and Paisley Joint Railway 14.25 miles (23 km)

Axholme Joint Railway 27.75 miles (45 km)
Cheshire Lines Committee (1/3 owned) 142 miles (229 km)
City of Glasgow Union Railway
Dumbarton & Balloch (including Loch Lomond steamers) 7 miles (11 km)
Dundee and Arbroath Railway (including Carmyllie Light Railway) 23 miles (37 km)
Great Central and Midland Joint Railway 40.25 miles (65 km)
Great Central, Hull & Barnsley and Midland Joint Railway (1/3 share) 4 miles (6 km)
Great Central and North Staffordshire Joint Railway 11 miles (18 km)
Great Northern and London and North Western Joint Railway 45 miles (72 km)
Halifax and Ovenden Railway 2.5 miles (4 km)
Halifax High Level 3 miles (5 km)
Manchester South Junction and Altrincham Railway (a “ joint working arrangement”) 9.5 miles (15 km)
Methley Joint Line 6 miles (10 km)
Midland and Great Northern Joint Railway 183.25 miles (295 km)
Norfolk and Suffolk Joint Railway (was GER/MidR/GNR joint) 22.5 miles (36 km)
Oldham, Ashton and Guide Bridge Railway 6.25 miles (10 km)
Otley and Ilkley Joint Railway 6.25 miles (10 km)
Perth General Station Committee (2/3 share)
Prince’s Dock, Glasgow 1.25 miles (2 km)
South Yorkshire Joint Railway (2/5 share) 20.5 miles (33 km)
Swinton and Knottingley Joint Railway 19.5 miles (31 km)
Tottenham and Hampstead Junction Railway 4.75 miles (8 km)

Birkenhead Railway 56.5 miles (91 km)
Brecon and Merthyr Railway & London and North Western Joint Railway 6 miles (10 km)
Brynmawr and Western Valleys Railway 1.25 miles (2 km)
Clee Hill Railway 6 miles (10 km)
Clifton Extension Railway 9 miles (14 km)
Halesowen Joint Railway 6 miles (10 km)
Nantybwch and Rhymney Railway 3 miles (5 km)
Severn and Wye Railway 39 miles (63 km)
Shrewsbury and Hereford Railway 82.75 miles (133 km)
Tenbury Railway 5 miles (8 km)
Vale of Towy Railway (owned by GWR but leased jointly) 11 miles (18 km)
West London Railway 2.25 miles (4 km)
Wrexham and Minera Railway 3 miles (5 km)

Dundalk, Newry and Greenore Railway 26.5 miles (43 km) - operated from 1933 by the GNR(I)
Northern Counties Committee's lines 265.25 miles (427 km)
Joint Midland and Great Northern of Ireland 91 miles (146 km)
County Donegal Railways Joint Committee (owned jointly with the Great Northern Railway of Ireland)

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The "Big Four" pre-nationalisation British railway companies

Great Western London Midland & Scottish London & North Eastern Southern

GWR constituents	Alexandra (Newport and South Wales) Docks and Railway Barry Railway Cambrian Railways Cardiff Railway Great Western Railway Rhymney Railway Taff Vale Railway Full list

LNER constituents	Great Central Great Eastern Great Northern Great North of Scotland Hull & Barnsley North British North Eastern Full list

LMS constituents	Caledonian Furness Glasgow & South Western Highland Lancashire & Yorkshire London and North Western Midland North Staffordshire Full list

SR constituents	London and South Western Railway London, Brighton and South Coast Railway London, Chatham and Dover Railway South Eastern and Chatham Railway South Eastern Railway Full list

See also History of rail transport in Great Britain 1923–1947 List of companies involved in the grouping