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;0P
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;0MT
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;9MT:The British Railways system of classifying steam locomotives by power using a number from 0, least powerful, to 9, most powerful, followed by either F for freight, P for Passenger or MT for Mixed Traffic.
;32xx:A GWR 2251 Class 0-6-0 engine
;36xx:A GWR 5700 Class 0-6-0PT engine
;55xx:A GWR 4575 Class 2-6-2T engine
;56xx:A GWR 5600 Class 0-6-2T engine
;57xx:A GWR 5700 Class 0-6-0PT engine
;74xx:A GWR 7400 Class 0-6-0PT engine
;A.J.Hill:Alfred John Hill, Chief Mechanical Engineer (CME) of the Great Eastern Railway 1912-1922
;ANPR:Automatic Number Plate Recognition
;Armstrong:Joseph Armstrong, Locomotive, Carriage and Wagon Superintendent of the Great Western Railway 1864-1877
;ARPS:Association of Railway Preservation Societies
;ATC:Automatic Train Control, a form of limited cab signalling developed by the GWR in 1906, superseded by BR's Automatic Warning System
;Atlantic:Locomotive with a 4-4-0 wheel configuration
;Austin:John Austin GRA, renowned Bridgnorth-based railway artist and Fellow of The Guild of Railway Artists
;AWS:Automatic Warning System, a form of limited cab signalling introduced in 1956
;B&MR:Brecon & Merthyr Tydfil Junction Railway
;Barry:Woodham Brothers Scrapyard, Barry, South Wales. The source of many locomotives now in preservation.
;Beames:Hewitt Pearson Montague Beames, Chief Mechanical Engineer (CME) of the London and North Western Railway 1920-1922.
;Billinton:Lawson Billinton, Locomotive Engineer of the London, Brighton and South Coast Railway 1912-1923
;Blue Star:An electro-magnetic form of multiple working equipment widely used by BR in first generation diesel locomotives and multiple units whereby multiple like-coded vehicles are capable of running under the control of one driver. A blue star coupling code is normally indicated on the front of the vehicle.
;BoT:Board of Trade
;B.R.
;BR:British Rail or British Railways
;B.R.C.W
;BRC&W
;BRCW:Birmingham Railway Carriage & Wagon Company
;BRC:Buckinghamshire Railway Centre
;BRUTE:British Railways Utility Trolley Equipment, a wire caged trolley with a low floor developed by BR to replace existing luggage trucks and mail bag trolleys.
;BSC:British Steel Corporation, or British Sugar Corporation
;Bulleid:Oliver Vaughan Snell Bulleid, Chief Mechanical Engineer (CME) of the Southern Railway 1937-1948
;C&W:Carriage & Wagon
;CBS:Community Benefit Society, a charitable body
;CBILS:Coronavirus Business Interruption Loan Scheme, a government backed loan scheme
;CFPS:Class 40 Preservation Society
;Ch:Chain. 22 yards or 1/80th of a mile
;chain
;chains:As a unit of measurement, 22 yards or 1/80th of a mile
;Churchward:George Jackson Churchward, Chief Mechanical Engineer (CME) of the Great Western Railway 1902-1922
;Clark:T. F. Clark, Chief Mechanical Engineer (CME) of the Metropolitan Railway
;CME:Chief Mechanical Engineer
;CNC:Computer Numerical Control. A computer converts the design produced by Computer Aided Design software into numbers which are used to control the movement of the cutter.
;Collett:Charles Benjamin Collett, Chief Mechanical Engineer (CME) of the Great Western Railway 1922-1941
;Commonwealth bogie
;Commonwealth bogies:BR's standard carriage bogie from 1955 to 1963, originally designed by the Commonwealth Steel Company (US) and manufactured under licence in the UK. A heavyweight cast steel bogie incorporating sealed roller bearings and coiled suspension to give a superior ride quality and a speed rating of 100mph.
;Composite:Carriage having more than one class of seating, ie First and Third or latterly First and Standard.
;Conflat:GWR telegraphic code signifying a flat wagon for containers
;CWR:Continuous Welded Rail, where joints between lengths of rail are welded rather than connected by fishplates.
;DCMS:The Department for Digital, Culture, Media & Sport (Department for Culture, Media and Sport until 2017)
;Dean:William Dean, Chief Locomotive Engineer of the Great Western Railway 1877-1902
;Departmental:Rolling stock used for the railway’s own functions (engineering etc.) rather than for general passenger or goods traffic.
;DMBS:Driving Motor Brake Second
;DMCL:Driving Motor Composite with lavatory
;DMU:Diesel Multiple Unit
;Down:In reference to the direction of travel means away from the major terminus (i.e. towards Bridgnorth on the present day SVR)
;Drott:Drott Manufacturing Company machine similar to a bulldozer used to level and compact soil
;Drummond:Dugald Drummond, Locomotive Engineer, later Chief Mechanical Engineer (CME) of the London & South Western Railway 1895-1905
;DTCL:Driving Trailer Composite with lavatory
;Dukedog:A GWR 9000 Class 4-4-0 engine, rebuilt using earlier 3300 Class 'Bulldog' frame and 3252 Class 'Duke' boiler.
;ECS:Empty Coaching Stock
;EE
;E.E.:English Electric
;ELR:Engineer's Line Reference, East Lancashire Railway
;E.M.D.:Electro-Motive Diesel, Inc., an American manufacturer of diesel-electric locomotives.
;ESMP :Engineering Services, Motive Power.
;ETH:Electric Train Heating
;ETT:Electric Train Token
;EWS:English, Welsh & Scottish Railway, a rail freight company
;F.P.L
;FPL:Facing Point Lock, equipment that physically locks points so that they cannot move.
;Fairburn:Charles Edward Fairburn, Chief Mechanical Engineer (CME) of the London, Midland and Scottish Railway 1944-1945
;FE:Footplate Experience
;Fowler:Henry Fowler, Chief Mechanical Engineer (CME) of the Midland Railway 1909-1923, and of the London, Midland and Scottish Railway 1923-1933
;GBRf: GB Railfreight, a main line rail freight operating company.
;GCR:Great Central Railway
;GER:Great Eastern Railway
;GNR:Great Northern Railway
;GNS
;GNSR:Great North of Scotland Railway
;GPO:General Post Office
;GRC&W
;GRCW:Gloucester Railway Carriage and Wagon Company
;Gresley:Sir Nigel Gresley, Chief Mechanical Engineer (CME) of the London & North Eastern Railway 1923-1941
;GUV:General Utility Van, formerly used to transport mail and parcels
;GWR:Great Western Railway
;GWS:Great Western Society
;GWSR:Gloucestershire Warwickshire Steam Railway (Commonly known as the Gloucestershire Warwickshire Railway)
;GW(SVR)A:Great Western (SVR) Association
;Hawksworth:Frederick Hawksworth, Chief Mechanical Engineer (CME) of the Great Western Railway 1941-1948
;headstock
;headstocks:The underframe member across each end of a wagon carrying the buffers and coupling. Known as the Bufferbeam on a locomotive.
;HLF:Heritage Lottery Fund (National Lottery Heritage Fund from 2019)
;Holden:Stephen Dewar Holden, Chief Mechanical Engineer (CME) of the Great Eastern Railway 1908-1912
;Hot box:A situation that occurs when an axle bearing overheats, causing damage to the axle box and the axle itself.
;HRA:Heritage Railway Association
;Instanter:A type of three link chain coupling with a special triangular-shaped middle link which provides sufficient slack for coupling, but when rotated through 90 degrees shortens the length of the chain, reducing the slack without the need to wind a screw.
;Internal User:Rolling stock used for the railway’s internal purposes (stores etc.) at one fixed location.
;IOMR:Isle of Man Railway
;Ivatt:Henry George Ivatt, Chief Mechanical Engineer (CME) of the London, Midland and Scottish Railway 1946-1948. CME of BR (London Midland Region) 1948-1951
;Johnson:Samuel Waite Johnson, Chief Mechanical Engineer (CME) of the Midland Railway 1873-1903
;Keruing: (Trade name) A type of medium hardwood timber obtained from trees of the genus Dipterocarpus
;LBSCR
;LB&SCR:London Brighton & South Coast Railway
;LCGB:Locomotive Club of Great Britain
;lever lead
;lever leads:The (usually brass) information panel on a point or signal lever informing the signalman which other levers need to be pulled to release that lever
;LIP
;L.I.P.:Locomotive Inspection Point
;LMS:London Midland & Scottish Railway
;LNER:London & North Eastern Railway
;SRLNWR:London & North Western Railway;Loriot:GWR telegraphic code signifying a machine truck;L.P.O.:Lost Property Office;LRO:Light Railway Order;LSWR:London & South Western Railway;Macaw:GWR telegraphic code signifying a timber truck;Maunsell:Richard Maunsell, Chief Mechanical Engineer (CME) of the South Eastern and Chatham Railway from 1913-1923, and of the Southern Railway1923-1937.;McIntosh:John Farquharson McIntosh, Chief Mechanical Engineer (CME) of the Caledonian Railway 1895-1914;MEWP;MEWPs:Mobile elevating work platform;Mica:GWR telegraphic code signifying a meat van;Mink:GWR telegraphic code signifying a covered goods van;Mogo:GWR telegraphic code signifying a covered motor car wagon;Mogul:Locomotive with a 2-6-0 wheel configuration;Morton:A type of brakes used on GWR wagons after Grouping in 1923, replacing the earlier DC (Dean Churchward) types.;MOSI:Museum Of Science & Industry;MPD:Motive Power Depot;MR:Midland Railway;MSC:Manchester Ship Canal;M.S.C.:Manpower Services Commission;M&SWJR:Midland & South West Junction Railway;NBI:Notice Board Issue. The SVR's on-line method of circulating information to working members.;NCB:National Coal Board
;NER:North Eastern Railway
;GNRNHMF:Great Northern RailwayTrustees of the National Heritage Memorial Fund – see HLF;LNWRNR:London & North Western RailwayNetwork Rail;LB&SCRNRM:London Brighton & South Coast The Railway Museum, formerly the National RailwayMuseum;SE&CRORR:South Eastern & Chatham Office of Rail and Road, formerly Office of Rail Regulation, the independent safety and economic regulator for Britain's railways which includes HM RailwayInspectorate;B&MROS:Brecon & Merthyr Tydfil Junction RailwayOrdnance Survey;BROTMR:British Rail or British RailwaysOn-Train Monitoring Recorder, a device similar in principle to the flight data recorder found on aircraft;BRCOW&W;OWW:Birmingham Oxford Worcester and Wolverhampton Railway Carriage & Wagon Company;SVR:Severn Valley RailwayP.W.;P.Way
;PW:Permanent Way
;Pacific:Locomotive with a 4-6-2 wheel configuration
;Prairie:Locomotive with a 2-6-2 wheel configuration
;PRISM:The Preservation of Industrial and Scientific Material (PRISM) Fund, a source of funding from the Arts Council/The Museums, Libraries and Archives Council.
;PTR:Port Talbot Railway & Docks Company
;R&H
;Ruston:Ruston and Hornsby Ltd. of Lincoln, engineer and locomotive manufacturer acquired by English Electric in 1966. Also, Ruston-Bucyrus Ltd established in 1930 and jointly owned by Ruston and Hornsby and Bucyrus-Erie (US)
;Railtrack:private sector owner of the national railway system from 1994 until 2002, created as part of the privatisation of British Rail. Succeeded by Network Rail
;Raven:Sir Vincent Litchfield Raven, Chief Mechanical Engineer (CME) of the North Eastern Railway 1910-1922
;RCE:Regional Civil Engineer(ing)
;RCH:Railway Clearing House
;Rexine:an early form of vinyl used by the LNER for wall coverings in teak coaches
;RHDR:Romney, Hythe and Dymchurch Railway
;Richard Deeley:Chief Mechanical Engineer (CME) of the Midland Railway 1904-1909
;Riddles:Robert Arthur "Robin" Riddles, Member of the Railway Executive for Mechanical and Electrical Engineering responsible for the design of the British Rail Standard Class locomotives
;RNAD:Royal Naval Armaments Depot
;S&DJR:Somerset & Dorset Joint Railway, jointly operated by the London and South Western and Midland Railways (later Southern and London Midland and Scottish Railways)
;S&HR:Shrewsbury and Hereford Railway
;S&T:Signals & Telegraph
;MPDSambron:Motive Power Sambron SA, a French manufacturer of telehandler-type forklifts used by the SVR for coaling;SE&CR;SECR:South Eastern and Chatham Railway;Siphon:GWR telegraphic code signifying a milk van;SLOA:Steam Locomotive Operators Association, formed in 1975 to bring together and assist operators wishing to run steam on the main line;SMS:Safety Management System;Snake:GWR telegraphic code signifying a passenger brake van;solebar;solebars:The outer member of a vehicle's underframe, running from end to end below the body;SR:Southern Railway;Stanier:William Stanier, Chief Mechanical Engineer (CME) of the London, Midland and Scottish Railway 1932-1944;Super D:An LNWR 0-8-0 goods engine;SURCC:Shropshire Union Railway & Canal Company;SVR:Severn Valley Railway;SVRA:Severn Valley Railway Association;SVRS:Severn Valley Railway Society;TBSL:Trailer Brake Second with lavatory;Telford Steam Railway;TSR:Telford Horsehay Steam Trust Limited, a Charitable heritage railway located at Horsehay, Telford with proposals for running heritage trains into the Ironbridge Gorge and onto the former GWR Severn Valley branch.;TMD:Traction Maintenance Depot, also referred to as Diesel Depot;C&WToad:GWR telegraphic code signifying a goods brake van, which became the standard design's nickname;Toadfit:Telegraphic code signifying a vacuum brake fitted brake van;TOPS:Total Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock.;TPO:Travelling Post Office;TSL:Trailer Second with lavatory;TUCC:Transport Users Consultative Committee;Type 1:The British Railways classification for diesel locomotives of up to 1000 bhp;Type 2:The British Railways classification for diesel locomotives of 1001 bhp to 1499 bhp;Type 3:The British Railways classification for diesel locomotives of 1500 bhp to 1999 bhp;Type 4:The British Railways classification for diesel locomotives of 2000 bhp to 2999 bhp;Type 5:The British Railways classification for diesel locomotives of 3000 bhp or more;UIC:Union Internationale des Chemins de fer (International Union of Railways);Up:In reference to the direction of travel means towards the major terminus (i.e. towards Kidderminster on the present day SVR);Urie:Robert Urie, Chief Mechanical Engineer (CME) of the London and South Western Railway 1912-1922;USATC:United States Army Transportation Corps;VSOE:Venice Simplon Orient Express;Wainwright:Harry Smith Wainwright, Locomotive, Carriage & and WagonSuperintendent of the South Eastern and Chatham Railway 1899-1913;DMUWarwell:Diesel Multiple UnitTelegraphic code signifying an ex War Department Well Trolley;WCR:West Coast Railways;Webb:Francis Webb, Locomotive Superintendant/Chief Mechanical Engineer (CME) of the London and North Western Railway 1871-1903;ETTWeltrol:Electric Train TokenTelegraphic code signifying a Well Trolley;BulliedWhale:Oliver Vaughan Snell BulleidGeorge Whale, Chief Mechanical Engineer (CME) of the Southern London and North Western Railway between 1937 1903-1909;Worsdell: Thomas William Worsdell, Chief Mechanical Engineer (CME) of the 1948Great Eastern Railway 1881-1885 and North Eastern Railway 1885-1890;WLA: Western Locomotive Association Ltd.;WMSP:West Midlands Safari Park;WTT: Working Timetable