Wikipedia:WikiProject UK Railways/Categories

The following (necessarily incomplete) list shows the majority of categories relevant to this WikiProject.
 * Category names in bold highlight major subject areas (to aid list navigation)
 * Indented bullets show subcategories within a parent category
 * Large sub-category sets (eg 'xxx by county') are summarised to avoid swamping the list
 * Sub-categories belonging to multiple parents (from this list) are shown once, under the 'most appropriate' parent
 * Project members are encouraged to add omissions to the list

Top-level parent categories
The following high-level categories are generally not used for individual articles as more appropriate subcategories can be found within them:
 * Category:Rail transport
 * Category:Locomotives
 * Category:Rolling stock
 * Category:Rail transport by country
 * Category:Rail transport in the United Kingdom
 * Category:Rail transport in Great Britain
 * Category:Rail transport in Northern Ireland
 * Category:Railway companies of the United Kingdom

Railway lines, stations and geography
These are subcategories of Category:Rail transport in the United Kingdom:
 * Category:Railway lines in the United Kingdom
 * Category:Closed British railway lines
 * Category:Network Rail routes
 * Category:Railway lines in England
 * Category:Woodhead Line: - articles mainly individual stations
 * Category:Railway lines in Northern Ireland
 * Category:Railway lines in Scotland
 * Category:Railway lines in Wales
 * Category:Rail transport in England
 * Category:Rail transport in ... county
 * Category:Rail transport in London
 * Category:Crossrail
 * Category:Docklands Light Railway
 * Category:London Overground
 * Category:London Post Office Railway
 * Category:London Rail
 * Category:London Underground
 * Category:Disasters on the London Underground
 * Category:London Underground stations
 * Category:London Underground rolling stock
 * Category:Railway stations in London
 * Category:Railway termini in London
 * Category:London Overground stations
 * Category:North London Line stations
 * Category:Thameslink
 * Category:Rail transport in Northern Ireland
 * Category:Closed railways in Northern Ireland
 * Category:Heritage railways in Northern Ireland
 * Category:Railway stations in Northern Ireland
 * Category:Rail transport in Scotland
 * Category:Heritage railways in Scotland
 * Category:Railway accidents in Scotland
 * Category:Railway companies of Scotland
 * Category:Railway lines in Scotland
 * Category:Disused railway stations in Scotland
 * Category:SPT railway stations
 * Category:Railway stations in ... county
 * Category:Railway stations in Scotland
 * Category:Rail transport in Wales
 * Category:Railway lines in Wales
 * Category:Railway stations in the United Kingdom
 * Category:Disused railway goods stations in the United Kingdom
 * Category:Disused railway stations in the United Kingdom
 * Category:Beeching closures
 * Category:Disused railway stations in England
 * Category:Disused railway stations in Northern Ireland
 * Category:Disused railway stations in Scotland
 * Category:Disused railway stations in Wales
 * Category:Disused railway stations in ... county (all the above countries except Northern Ireland)
 * Category:Railway stations in England
 * Category:Railway stations in ... county
 * Category:Railway stations in London
 * Category:Railway stations in Wales
 * Category:Railway stations in Scotland
 * Category:Network Rail managed stations
 * Category:Railway stations serving airports in the United Kingdom
 * Category:Railway stations serving harbours and ports in the United Kingdom
 * Category:United Kingdom railway station stubs

Railway companies
These are subcategories of Category:Railway companies of the United Kingdom:
 * Category:Big four British railway companies
 * Category:Great Western Railway
 * Category:London and North Eastern Railway
 * Category:London and North Eastern Railway constituents
 * Category:Great Central Railway
 * Category:Great Eastern Railway
 * Category:Great Northern Railway (Great Britain)
 * Category:North Eastern Railway (UK)
 * Category:London, Midland and Scottish Railway
 * Category:London, Midland and Scottish Railway constituents
 * Category:Lancashire and Yorkshire Railway
 * Category:London and North Western Railway
 * Category:Grand Junction Railway
 * Category:Midland Railway
 * Category:Southern Railway (UK)
 * Category:British joint railway companies
 * Category:Cheshire Lines Committee Lines
 * Category:British Rail
 * Category:Beeching closures
 * Category:British Rail regions
 * Category:Thameslink
 * Also several subcategories regarding rolling stock, see separate section below.
 * Category:Broad gauge (7 feet) railway companies
 * Category:Community railway lines in the United Kingdom
 * Category:Early British railway companies
 * Category:Early Scottish railway companies
 * Category:Minor British railway companies - those not grouped in 1923
 * Category:Post-privatisation British railway companies
 * Category:EWS railway companies
 * Category:First Group railway companies
 * Category:Train operating companies
 * Category:Defunct train operating companies
 * Category:Open-access train operating companies
 * Category:Pre-grouping British railway companies - duplicates links through Big Four Companies above
 * Category:Railtour operators of the United Kingdom
 * Category:Railway companies of Scotland
 * '''Category:Railway scrapyards in the United Kingdom

These are categories from other areas that have also been used by articles within the scope of this project:
 * Category:Transport operators of the United Kingdom

Locomotives and rolling stock
These are subcategories of Category:Locomotives. Most are also subcategories of the appropriate company categories listed above. These are subcategories of Category:Rolling stock:
 * Category:Broad gauge (7 feet) railway locomotives
 * Category:Diesel locomotives
 * category:British Rail diesel locomotives
 * Category:Electric locomotives
 * Category:1500V DC locomotives
 * Category:25 kV AC locomotives, etc.
 * Category:Experimental locomotives
 * Category:Fictional locomotives
 * Category:Individual locomotives
 * Category:Preserved British steam locomotives
 * Category:Rainhill Trials locomotives
 * Category:Locomotives by builder
 * Category:Andrew Barclay locomotives
 * Category:Brush Traction locomotives
 * etc.
 * Category:Locomotives by railway
 * Category:Eurotunnel locomotives
 * Category:Locomotives of the Glasgow and South Western Railway
 * Category:Liverpool and Manchester Railway locomotives
 * Category:Metropolitan Railway locomotives
 * Category:Northern Ireland Railway locomotives
 * Category:War Department locomotives
 * Category:British Rail locomotives
 * Category:British Rail diesel locomotives
 * Category:British Rail electric locomotives
 * Category:British Railways gas turbine locomotives
 * Category:British Railways standard classes
 * Category:Great Western Railway locomotives
 * Category:London and North Eastern Railway locomotives
 * Category:Great Central Railway locomotives
 * Category:Great Eastern Railway locomotives
 * Category:Great Northern Railway (Great Britain) locomotives
 * Category:North British Railway locomotives
 * Category:North Eastern Railway locomotives
 * Category:London, Midland and Scottish Railway locomotives
 * Category:Caledonian Railway locomotives
 * Category:Highland Railway locomotives
 * Category:Lancashire and Yorkshire Railway locomotives
 * Category:London and North Western Railway locomotives
 * Category:Midland Railway locomotives
 * Category:North London Railway locomotives
 * Category:Northern Counties Committee locomotives
 * Category:Somerset and Dorset Joint Railway locomotives
 * Category:Southern Railway (UK) locomotives
 * Category:London and South Western Railway locomotives
 * Category:London, Brighton and South Coast Railway locomotives
 * Category:South Eastern and Chatham Railway locomotives
 * etc.
 * Category:Locomotives by wheel arrangement
 * Category:0-6-0 locomotives
 * Category:Co-Co locomotives
 * etc.
 * Category:Steam locomotives
 * Category:Preserved British steam locomotives
 * Category:Coaching stock
 * Category:British Rail coaching stock
 * Category:Multiple units
 * Category:British Rail diesel multiple units
 * Category:British Rail electric multiple units
 * Category:British Rail coaching stock
 * Category:Rolling stock manufacturers
 * Category:High-speed trains

Heritage railways
These are subcategories of Category:Rail transport in Great Britain:
 * Category:Heritage railways in the United Kingdom
 * Category:Heritage railways in the Channel Islands
 * Category:Heritage railways in England
 * Category:Heritage railways in the Isle of Man
 * Category:Railway stations on the Isle of Man
 * Category:Heritage railways in Northern Ireland
 * Category:Heritage railways in Scotland
 * Category:Heritage railways in Wales

These are subcategories of Category:Railway stations in England:
 * Category:Heritage railway stations in England
 * Category:Heritage railway stations in ... county

Other categories
These are subcategories of Category:Rail transport:
 * Category:People in rail transport
 * Category:Locomotive builders and designers
 * Category:Pioneers of rail transport
 * Category:Rail transport magazines
 * Category:Fiction about rail transport
 * Category:Fictional locomotives
 * Category:Fictional trains
 * Category:The Railway Series – see Wikiproject Thomas for full list of sub-cats
 * Category:Rail infrastructure
 * Category:Level crossings
 * Category:British railway junctions
 * Category:Railway bridges
 * Category:Railway engine sheds
 * Category:Railway depots in the United Kingdom
 * Category:Railway freight terminals
 * Category:Railway lines
 * Category:Narrow gauge railways
 * Category:Four foot gauge railways
 * Category:Metre gauge railways
 * Category:Minimum gauge railways
 * Category:Narrow gauge locomotives
 * Category:Three foot gauge railways
 * Category:Three foot six inch gauge railways
 * Category:Two foot gauge railways
 * Category:Two foot nine inch gauge railways
 * Category:Two foot six inch gauge railways
 * Category:Two foot three inch gauge railways

These are subcategories of Category:Rail transport in Great Britain:
 * Category:Railway workshops in the United Kingdom
 * Category:Eurostar
 * Category:Channel Tunnel
 * Category:Locomotive manufacturers of the United Kingdom
 * Category:Named passenger trains of the United Kingdom
 * Category:Railway accidents in the United Kingdom
 * Category:Railway accidents in Scotland
 * Category:Railway museums in the United Kingdom
 * Category:Railway towns in England
 * Category:Railway tunnels in the United Kingdom
 * '''Category:Railway tunnels in England‎
 * '''Category:Railway tunnels in Scotland‎
 * '''Category:Railway tunnels in Wales‎

These are categories from other areas that have also been used by articles within the scope of this project:
 * Category:British railway-related lists
 * Category:Railway Acts
 * Category:Railway stations by year of establishment
 * Category:Railway stations opened in 1835, etc.
 * Category:United Kingdom Acts of Parliament 1835, etc.
 * Category:Rail trails in the United Kingdom
 * Category:1806 births, etc.
 * Category:1859 architecture, etc.