British Rail Second Corridor
A Mk1 Second Corridor (SK) coach at the North Norfolk Railway in 2007
In service1951–present
ManufacturerBR Ashford/Easteigh, Derby (C&W), Doncaster, Swindon, Wolverton, York, BRCW, Cravens, GRCW, & Metro Cammell
Family nameBritish Railways Mark 1 and Mark 2A, 2B and 2C
ConstructedMk1 1951–1963
XP64 1964
Mk2a 1968
Mk2b 1969
Mk2c 1969-70
Number built2168
Fleet numbersMk1 24000–25507, 25510–26217
XP64 25508-25509
Mk2a 19452-19473
Mk2b 19478-19513
Mk2c 19515-19560
CapacityMk1 48 with armrests
64 without
Mk2a/b/c 42
OperatorsBritish Rail
Specifications
Car length64 ft 6 in (19.66 m)
Width9 ft 3 in (2.82 m)
Height12 ft 9+12 in (3.90 m)
DoorsManual slam doors, three on each side
Maximum speedBR1: 90 mph (145 km/h)
B4/CW: 100 mph (161 km/h)
Weight32.5 to 36.5 long tons (33.0 to 37.1 t; 36.4 to 40.9 short tons)
HVACSteam or electric heat, or both
BogiesBR1, Commonwealth or B4
Braking system(s)Vacuum, air, or both
Coupling systemDrop-head knuckle coupler on draw-hook (dual)
Track gauge4 ft 8+12 in (1,435 mm) standard gauge

The Second Corridor (previously Third Corridor) type of railway carriage was one of the standard mid-20th century designs, and was coded SK (previously TK) by the LNER and BR, and CF by the LMS. The layout of the coach was a number of compartments, all of which were second class (known as third class until 1956), linked by a side corridor.

The British Railways Mark 1 SK was the most numerous carriage design ever built in the United Kingdom. The original number series carried was 24000–26217. From 1983, those carriages in the 25xxx and 26xxx series were renumbered 18xxx and 19xxx.

There were two variants, those built for the Midland, Scottish, and Eastern / North Eastern regions had six seats per compartment, with fold-up arm-rests which folded into the seat-back, while those built for the Southern and Western regions, with their heavy commuter loadings into London, had eight seats in each compartment, and no arm-rests. Seating was of the interior sprung bench type. Over time, some SKs and BSKs were re-allocated from other regions to the Western, who tended to try to stitch the arm-rests in the up position.

In 1985, a number of Mark 2 First Corridor carriages were declassified to become SKs. They were renumbered from 13xxx to 19xxx, putting them after the end of the Mark 1 range (19452–19560).

No carriages of this type are still in daily use on the main line network, since open saloon carriages are now preferred by operating companies. However, some electric multiple units based on Mark 1 coaches have standard class compartments, such as Class 438. Many SKs still operate on preserved UK railway lines.

Designations for second corridor carriages are as follows:

LNER Code Description LMS Code
BSK Brake Second Corridor CH
DMBSK Driving Motor Brake Second Corridor
DMSK Driving Motor Second Corridor
MBSK Motor Brake Second Corridor
SK Second Corridor CF
TBSK Trailer Brake Second Corridor
TSK Trailer Second Corridor

Livery

In 1951 the initial livery for Mk1 coaches on British Railways was crimson lake and cream with black and gold lining, and all new Mk1 SK coaches were delivered in this livery up until 1956. In 1956 the standard livery changed to maroon with black and gold lining, except for the Southern region stock which adopted an unlined dark malachite green. Western Region adopted chocolate and cream on sufficient stock to operate its named trains such as the Cornish Riviera Express and the Torbay Express. In 1965 Manastral Blue & Grey livery was introduced as trailed on XP64 stock the year before and was the network standard for over 20 years. In the 1980s the NSE livery of white with blue at window level and red stripe under was introduced for stock in the south east of England.

Orders

Lot No.DiagramMarkBuiltBuilderQtyFleet numbersNotes
3000214611951Derby18024000–24179BR1 bogies
3001514611951-2Doncaster4024180–24219BR1 bogies
3002614611951-2York8224220–24301BR1 bogies
3002014611952Ashford2424302–24331BR1 bogies
3000714611953BRCW3624332–24396BR1 bogies
3003014611953Derby4024397–24436BR1 bogies
3007214611953Wolverton1024437–24446BR1 bogies
3008814611954Swindon2224447–24468BR1 bogies
3007014611954York3624469–24538BR1 bogies
3006814711952York3024539–24548BR1 bogies
3007014611952York824549-24556BR1 bogies
3007014611954York1224557–24568BR1 bogies
3007014611954-55York724569-24575BR1 bogies
3005714611953BRCW10024576–24675BR1 bogies
3005814611953Cravens2524676–24700BR1 bogies
3005914711953Cravens2024701–24720BR1 bogies
3007314611953Wolverton2524721–24745BR1 bogies
3007714711954Swindon824746–24753BR1 bogies
3007814611954Swindon4224754–24795BR1 bogies
3013714611954BRCW2324796–24818BR1 bogies
3015314611955-56Derby12624819–24944BR1 bogies
3015414611956Derby3024945–24974BR1 bogies
3020814611956Derby7024975–25044BR1 bogies
3015514711955-56Wolverton12025045–25164BR1 bogies
3023014711957Metro Cammell8325165–25247BR1 bogies
3023114611957-58Metro Cammell3225248–25279BR1 bogies
3049415011958Metro Cammell325280–25282BR1 bogies
3034914611957Wolverton12025283–25402BR1 bogies
3035014611957Wolverton2225403–25454BR1 bogies
3035614811957Metro Cammell125455BR1 bogies
3035814911957GRCW125456BR1 bogies
3037115111957Doncaster125457BR1 bogies
3037414611957York5025458-25507BR1 bogies
30737152XP641964Derby225508-25509B4 bogies
3042614611957-58Wolverton14625558-25703BR1 bogies
3068514611961-62Derby20225704-25905CW bogies
3068514611962Derby6725906-25972BR1 bogies
3071914611962Derby8725973-26059CW bogies
3072014711962-63Derby7826060-26137CW bogies
3072614611962-63York8026138-26217CW bogies

Conversions

  • In 1973-74 4 Second Corridor were converted to Class 309 TSK later become TSOL
  • In 1976, 9 Second Corridor were converted to Stowage Vans 80431-80439 POT
  • In 1977, 15 Second Corridor were converted to Sorting Vans 80381-80395 POS.
SKTSKDiagram
2602471110469Class 309
2618971108469Class 309
2619671109469Class 309
2620371107469Class 309
SKTypeYearDiagram
25033POS803831977726A/NS531
25045POS803871977726A/NT531
25047POS803901977726A/NT531
25056POS803951977726A/NT531
25068POT804371976727A/NT521
25071POT804321976727A/NS521
25077POT804361976727A/NS521
25078POS803841977726A/NS531
25082POS803921977726A/NS531
25083POS803851977726A/NS531
25088POS803881977726A/NS531
25089POS803911977726A/NS531
25099POS803861977726A/NS531
25103POS803891977726A/NS531
25104POT804311976727A/NS521
25109POS803821977726A/NS531
25112POS803811977726A/NS531
25117POT804351976727A/NT521
25119POS803931977726A/NT531
25127POT804391976726A/NT521
25434POT804341976726A/NT521
25139POT804381976727A/NT521
25150POT804331976727A/NT521
25156POS803941977726A/NT531

Departmental use

Mk1
SKDepartmentalNotes
24011DB975415Match wagon for ballast cleaner
24026ADB977057Doncester works test train
24035ADB975439Crewe works test train
24062LDB975062CM&EE Electrification staff coach
24067LDB975064CM&EE Electrification staff coach
24070ADB975161BTU tool van
24085TDB977187Train crew training coach
24119ZDB975074Exhibition coach
24134LDB975065CM&EE Electrification staff coach
24140LDB975066CM&EE Electrification staff coach
24147ZDB975073Exhibition coach
24154ADB975263Overhead Line Maintenance Stores coach
24157ADB975162BUT Tool & Generator coach
24168LDB975067CM&EE Electrification staff coach
24189LDB975068CM&EE Electrification staff coach
24274ADB975801CCE staff & dormitory coach for ballast cleaner
24308DB975392Match wagon for ballast cleaner DR76216
24320LDB975069CM&EE Electrification staff coach
24345ADB975806CCE staff coach
24410LDB975070CM&EE Electrification staff coach
24420KDB975114S&T cable flat
24428ADB977058Doncester works test train
24429ADB975904Overhead Line Maintenance cable flat
24430TDB977188Train crew training coach
24457ADB975799CCE staff & dormitory coach for ballast cleaner
24485DB975412Match wagon for ballast cleaner
24516TDB977189Train crew training coach
24531ADB975726Overhead Line Maintenance generator & stores coach
24579ADB977090CCE staff coach
24589ADB975546Overhead Line Maintenance cable flat
24647TDB975135Lecture coach
24677TDB977247MOD special instruction coach
24679TDB977248MOD special instruction coach
24685TDB977422Special instruction coach
24745KDB975106S&T cable flat
24752ADB975440Crewe works test train
24766ADB975732Overhead Line Maintenance stores & roof access coach
24796ADB975802CCE staff & dormitory coach for ballast cleaner
24815ADB975803CCE staff & dormitory coach for ballast cleaner
24841TDB977497Special instruction coach
24849ADB975925Overhead Line Maintenance cable flat
24857TDB977498Special instruction coach
24858ADB977059Doncester works test train
24870ADB975441Crewe works test train
24890TDB977430Special instruction coach
24899CDB977103EMU barrier coach
24936ADB975442Crewe works test train
24972ADB975805CCE staff & dormitory coach for single line gantries
24976DB975828Underframes used for CCE staff & dormitory portakabin
24982DB975379CCE staff & dormitory coach
24990ADB975926Overhead Line Maintenance cable flat
24994ADB975915Overhead Line Maintenance cable flat
25003ADB975913Overhead Line Maintenance cable flat
25017ADB975742Overhead Line Maintenance office & staff coach
25025ADB975920Overhead Line Maintenance cable flat
25026ADB975922Overhead Line Maintenance cable flat
25038ADB977320Crewe works diesel loco test train coach
25069ADB975924Overhead Line Maintenance cable flat
25079ADB975080BTU tool van
25094ADB975908Overhead Line Maintenance cable flat
25105ADB975905Overhead Line Maintenance cable flat
2510618106ADB977322Crewe works diesel loco test train coach
25122ADB975443Crewe works test train
25132ADB975797CCE staff & dormitory coach for ballast cleaner
25161ADB975906Overhead Line Maintenance cable flat
25171TDB977195MOD special instruction coach
25190ADB975736Overhead Line Maintenance stores & roof access coach
25196ADB975927Overhead Line Maintenance cable flat
25205ADB975930Overhead Line Maintenance cable flat
25222ADB975622EMU Barrier coach
25226ADB975722Overhead Line Maintenance generator & stores coach
25236CDB977102EMU barrier coach
25238ADB975923Overhead Line Maintenance cable flat
25243ADB975946Overhead Line Maintenance cable flat
25262ADB975712Overhead Line Maintenance stores coach
25281DB975816Underframes used for CCE staff & dormitory portakabin
2528618286TDB977496Special instruction coach
25302ADB975771Overhead Line Maintenance office & staff coach
2531818318ADB977323Crewe works diesel loco test train coach
25326ADB977319Crewe works diesel loco test train coach
25329DB975829Underframes used for CCE staff & dormitory portakabin
25338TDB977173Train crew training coach
25339ADB977151Crewe work test tain
25340ADB975903Overhead Line Maintenance cable flat
25343ADB975798CCE staff & dormitory coach for ballast cleaner
25353ADB975763Overhead Line Maintenance generator & stores coach
2535618356ADB977321Crewe works diesel loco test train coach
25358ADB975743Overhead Line Maintenance office & staff coach
25388ADB975723Overhead Line Maintenance generator & stores coach
25396TDB977174Train crew training coach
2540718407TDB977407MOD special instruction coach
2541218412TDB977584Special instruction coach
25420ADB975713Overhead Line Maintenance stores coach
2542218422TDB977499Special instruction coach
25429DB975817Underframes used for CCE staff & dormitory portakabin
25430ADB975758Overhead Line Maintenance stores coach
25434ADB975711Overhead Line Maintenance stores coach
25437ADB975762Overhead Line Maintenance generator & stores coach
25440ADB975744Overhead Line Maintenance office & staff coach
25461ADB975767Overhead Line Maintenance stores & roof access coach
25466ADB975714Overhead Line Maintenance stores coach
25477ADB975766Overhead Line Maintenance stores & roof access coach
25479ADB975738Overhead Line Maintenance stores & roof access coach
25480DB975825Underframes used for CCE staff & dormitory portakabin
25493DB975822Underframes used for CCE staff & dormitory portakabin
25494TDB977237MOD special instruction coach
25495ADB975759Overhead Line Maintenance stores coach
25497DB975830Underframes used for CCE staff & dormitory portakabin
25498ADB975947Overhead Line Maintenance cable flat
25507ADB975800CCE staff & dormitory coach for ballast cleaner
25567TDB977129MOD Special instruction coaches
2557018570TDB977408MOD spechal instruction coach
25600ADB975721Overhead Line Maintenance generator & stores coach
2560218602DB977724CE staff & tool coach
25623CDB977100EMU barrier coach
25664ADB975741Overhead Line Maintenance office & staff coach
25666ADB975444Crewe works test train
25667DB975824Underframes used for CCE staff & dormitory portakabin
25669DB975821Underframes used for CCE staff & dormitory portakabin
25695ADB975734Overhead Line Maintenance stores & roof access coach
25696ADB975804CCE staff & dormitory coach for ballast cleaner
25699DB975823Underframes used for CCE staff & dormitory portakabin
2572918729ADB977982Brake Force Runner
2573518735TDB977653Special instruction coach
2575518755TDB977419Special instruction coach
25764ADB975731Overhead Line Maintenance stores & roof access coach
2580718807TDB977420Special instruction coach
2581118811TDB977514Driver training coach
2583118831TDB977458Driver training coach
2584018840TDB977459Driver training coach
2584618846TDB977515Driver training coach
2585218852TDB977429Special instruction coach
2585918859TDB977428Special instruction coach
2586018860TDB977516Driver training coach
2587818878TDB977517Driver training coach
2588418884TDB977460Driver training coach
2588518885TDB977461Driver training coach
25953ADB975866EMU barrier coach
2597318973TDB977462Driver training coach
2598518985TDB977463Driver training coach
2600219002TDB977464Driver training coach
2601019010TDB977465Driver training coach
2602019020TDB977512Driver training coach
Mk2a
FKSKDepartmentalNotes
1345819458RDB977914Test Train coach
13462194656352Mk4 Barrier coach
1346619466TDB977662MOD Special instruction coach
Mk2b
FKSKDepartmentalNotes
1347619476RDB977525Brake force runner
13478194786353Mk4 Barrier coach
1348119481RDB977530Brake force runner
1348419484RDB977528Brake force runner
1348519485TDB977663MOD Special instruction coach
1348719487RDB977529Brake force runner
1349119491TDB977661MOD Special instruction coach
1350119501TDB977656MOD Special instruction coach
1350519505TDB977654MOD Special instruction coach
1351119511TDB977660MOD Special instruction coach
Mk2c
FKSKDepartmentalNotes
1351819518TDB977659MOD Special instruction coach
1353119531TDB977658MOD Special instruction coach
1355719557TDB977655MOD Special instruction coach

Corridor Brake Standard/Second

A second corridor coach with a guard's brake compartment is designated BSK. The Mark 1 BSKs had 4 compartments, built as two variants with or without arm-rests depending on region, as with the SKs.

See also

References

    • Keith Parkin Locomotive Hauled Mark 1 Coaching Stock of British Railways The Historical Model Railway Society, ISBN 9780902835061
    • British Railways Vehicle Diagram Book 200 for Loco Hauld Coaches http://www.barrowmoremrg.co.uk/BRBDocuments/CS/Book_No_200_EK_web.pdf
    • Michael Harris British Rail Mark 2 Coaches - the design that launched InterCity Venture Publications ISBN 978-1-898432-48-7
    • Ashley Butlin British Rail Coaching Fleet Mk2, Mk3 & Mk4 A British Railways Illustrated Modern Times Series, Irwell Press ISBN 1-871608-87-2
    • G.M.Kichenside British Railways Coaches 1958 Ian Allan ABC
    • P Mallaband & L J Bowles Coaching Stock of British Railways 1976 Railway Correspondence and Travel Society
    • P Mallaband & L J Bowles Coaching Stock of British Railways 1978 Railway Correspondence and Travel Society, ISBN 9780901115447
    • P Mallaband & L J Bowles Coaching Stock of British Railways 1982 Railway Correspondence and Travel Society
    • Departmental Coaching Stock DB97xxxx series 1983 Edition, Lineside Publications
    • Peter Fox Departmental Coaching Stock First Edition 1984 Platform 5 Publications, ISBN 9780906579473
    • Roger Butcher & Peter Fox Departmental Coaching Stock Second Edition 1985 Platform 5 Publications, ISBN 9780906579473
    • Roger Butcher & Peter Fox Departmental Coaching Stock Third Edition 1987 Platform 5 Publications, ISBN 9780906579701
    • Roger Butcher, Peter Fox & Peter Hall Departmental Coaching Stock Fourth Edition 1990 Platform 5 Publications, ISBN 9780906579978
    • Roger Butcher Departmental Coaching Stock Fifth Edition 1993 SCT Publications, ISBN 9781872768106
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