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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Preservation Societies;ATC:Automatic Train Control, a form of limited cab signalling developed by the GWR in 1906, superseded by BR's Automatic Warning System ;Atlantic:Locomotive with a 4-4-0 wheel configuration;Austin:John Austin GRA, renowned Bridgnorth-based railway artist and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;LNWR: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 Railway 1923-1937.;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;NHMF:Trustees of the National Heritage Memorial Fund – see HLF;NR:Network Rail;NRM:The Railway Museum, formerly the National Railway Museum;ORR:Office of Rail and Road, formerly Office of Rail Regulation, the independent safety and economic regulator for Britain's railways which includes HM Railway Inspectorate;OS:Ordnance Survey;OTMR:On-Train Monitoring Recorder, a device similar in principle to the flight data recorder found on aircraft;OW&W;OWW:Oxford Worcester and Wolverhampton Railway;P.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;Sambron: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;Toad: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 Wagon Superintendent of the South Eastern and Chatham Railway 1899-1913;Warwell:Telegraphic 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;Weltrol:Telegraphic code signifying a Well Trolley;Whale: George Whale, Chief Mechanical Engineer (CME) of the London and North Western Railway 1903-1909;Worsdell: Thomas William Worsdell, Chief Mechanical Engineer (CME) of the Great Eastern Railway 1881-1885 and North Eastern Railway 1885-1890;WLA: Western Locomotive Association Ltd.;WMSP:West Midlands Safari Park;WTT: Working Timetable