Standard Corridor

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+1⁄2 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+1⁄2 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.[clarification needed]

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. Diagram Mark Built Builder Qty Fleet numbers Notes
30002 146 1 1951 Derby 180 24000–24179 BR1 bogies
30015 146 1 1951-2 Doncaster 40 24180–24219 BR1 bogies
30026 146 1 1951-2 York 82 24220–24301 BR1 bogies
30020 146 1 1952 Ashford 24 24302–24331 BR1 bogies
30007 146 1 1953 BRCW 36 24332–24396 BR1 bogies
30030 146 1 1953 Derby 40 24397–24436 BR1 bogies
30072 146 1 1953 Wolverton 10 24437–24446 BR1 bogies
30088 146 1 1954 Swindon 22 24447–24468 BR1 bogies
30070 146 1 1954 York 36 24469–24538 BR1 bogies
30068 147 1 1952 York 30 24539–24548 BR1 bogies
30070 146 1 1952 York 8 24549-24556 BR1 bogies
30070 146 1 1954 York 12 24557–24568 BR1 bogies
30070 146 1 1954-55 York 7 24569-24575 BR1 bogies
30057 146 1 1953 BRCW 100 24576–24675 BR1 bogies
30058 146 1 1953 Cravens 25 24676–24700 BR1 bogies
30059 147 1 1953 Cravens 20 24701–24720 BR1 bogies
30073 146 1 1953 Wolverton 25 24721–24745 BR1 bogies
30077 147 1 1954 Swindon 8 24746–24753 BR1 bogies
30078 146 1 1954 Swindon 42 24754–24795 BR1 bogies
30137 146 1 1954 BRCW 23 24796–24818 BR1 bogies
30153 146 1 1955-56 Derby 126 24819–24944 BR1 bogies
30154 146 1 1956 Derby 30 24945–24974 BR1 bogies
30208 146 1 1956 Derby 70 24975–25044 BR1 bogies
30155 147 1 1955-56 Wolverton 120 25045–25164 BR1 bogies
30230 147 1 1957 Metro Cammell 83 25165–25247 BR1 bogies
30231 146 1 1957-58 Metro Cammell 32 25248–25279 BR1 bogies
30494 150 1 1958 Metro Cammell 3 25280–25282 BR1 bogies
30349 146 1 1957 Wolverton 120 25283–25402 BR1 bogies
30350 146 1 1957 Wolverton 22 25403–25454 BR1 bogies
30356 148 1 1957 Metro Cammell 1 25455 BR1 bogies
30358 149 1 1957 GRCW 1 25456 BR1 bogies
30371 151 1 1957 Doncaster 1 25457 BR1 bogies
30374 146 1 1957 York 50 25458-25507 BR1 bogies
30737 152 XP64 1964 Derby 2 25508-25509 B4 bogies
30426 146 1 1957-58 Wolverton 146 25558-25703 BR1 bogies
30685 146 1 1961-62 Derby 202 25704-25905 CW bogies
30685 146 1 1962 Derby 67 25906-25972 BR1 bogies
30719 146 1 1962 Derby 87 25973-26059 CW bogies
30720 147 1 1962-63 Derby 78 26060-26137 CW bogies
30726 146 1 1962-63 York 80 26138-26217 CW 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.
SK TSK Diagram
26024 71110 469 Class 309
26189 71108 469 Class 309
26196 71109 469 Class 309
26203 71107 469 Class 309
SK Type Year Diagram
25033 POS 80383 1977 726A/NS531
25045 POS 80387 1977 726A/NT531
25047 POS 80390 1977 726A/NT531
25056 POS 80395 1977 726A/NT531
25068 POT 80437 1976 727A/NT521
25071 POT 80432 1976 727A/NS521
25077 POT 80436 1976 727A/NS521
25078 POS 80384 1977 726A/NS531
25082 POS 80392 1977 726A/NS531
25083 POS 80385 1977 726A/NS531
25088 POS 80388 1977 726A/NS531
25089 POS 80391 1977 726A/NS531
25099 POS 80386 1977 726A/NS531
25103 POS 80389 1977 726A/NS531
25104 POT 80431 1976 727A/NS521
25109 POS 80382 1977 726A/NS531
25112 POS 80381 1977 726A/NS531
25117 POT 80435 1976 727A/NT521
25119 POS 80393 1977 726A/NT531
25127 POT 80439 1976 726A/NT521
25434 POT 80434 1976 726A/NT521
25139 POT 80438 1976 727A/NT521
25150 POT 80433 1976 727A/NT521
25156 POS 80394 1977 726A/NT531

Departmental use

Mk1
SK Departmental Notes
24011 DB975415 Match wagon for ballast cleaner
24026 ADB977057 Doncester works test train
24035 ADB975439 Crewe works test train
24062 LDB975062 CM&EE Electrification staff coach
24067 LDB975064 CM&EE Electrification staff coach
24070 ADB975161 BTU tool van
24085 TDB977187 Train crew training coach
24119 ZDB975074 Exhibition coach
24134 LDB975065 CM&EE Electrification staff coach
24140 LDB975066 CM&EE Electrification staff coach
24147 ZDB975073 Exhibition coach
24154 ADB975263 Overhead Line Maintenance Stores coach
24157 ADB975162 BUT Tool & Generator coach
24168 LDB975067 CM&EE Electrification staff coach
24189 LDB975068 CM&EE Electrification staff coach
24274 ADB975801 CCE staff & dormitory coach for ballast cleaner
24308 DB975392 Match wagon for ballast cleaner DR76216
24320 LDB975069 CM&EE Electrification staff coach
24345 ADB975806 CCE staff coach
24410 LDB975070 CM&EE Electrification staff coach
24420 KDB975114 S&T cable flat
24428 ADB977058 Doncester works test train
24429 ADB975904 Overhead Line Maintenance cable flat
24430 TDB977188 Train crew training coach
24457 ADB975799 CCE staff & dormitory coach for ballast cleaner
24485 DB975412 Match wagon for ballast cleaner
24516 TDB977189 Train crew training coach
24531 ADB975726 Overhead Line Maintenance generator & stores coach
24579 ADB977090 CCE staff coach
24589 ADB975546 Overhead Line Maintenance cable flat
24647 TDB975135 Lecture coach
24677 TDB977247 MOD special instruction coach
24679 TDB977248 MOD special instruction coach
24685 TDB977422 Special instruction coach
24745 KDB975106 S&T cable flat
24752 ADB975440 Crewe works test train
24766 ADB975732 Overhead Line Maintenance stores & roof access coach
24796 ADB975802 CCE staff & dormitory coach for ballast cleaner
24815 ADB975803 CCE staff & dormitory coach for ballast cleaner
24841 TDB977497 Special instruction coach
24849 ADB975925 Overhead Line Maintenance cable flat
24857 TDB977498 Special instruction coach
24858 ADB977059 Doncester works test train
24870 ADB975441 Crewe works test train
24890 TDB977430 Special instruction coach
24899 CDB977103 EMU barrier coach
24936 ADB975442 Crewe works test train
24972 ADB975805 CCE staff & dormitory coach for single line gantries
24976 DB975828 Underframes used for CCE staff & dormitory portakabin
24982 DB975379 CCE staff & dormitory coach
24990 ADB975926 Overhead Line Maintenance cable flat
24994 ADB975915 Overhead Line Maintenance cable flat
25003 ADB975913 Overhead Line Maintenance cable flat
25017 ADB975742 Overhead Line Maintenance office & staff coach
25025 ADB975920 Overhead Line Maintenance cable flat
25026 ADB975922 Overhead Line Maintenance cable flat
25038 ADB977320 Crewe works diesel loco test train coach
25069 ADB975924 Overhead Line Maintenance cable flat
25079 ADB975080 BTU tool van
25094 ADB975908 Overhead Line Maintenance cable flat
25105 ADB975905 Overhead Line Maintenance cable flat
25106 18106 ADB977322 Crewe works diesel loco test train coach
25122 ADB975443 Crewe works test train
25132 ADB975797 CCE staff & dormitory coach for ballast cleaner
25161 ADB975906 Overhead Line Maintenance cable flat
25171 TDB977195 MOD special instruction coach
25190 ADB975736 Overhead Line Maintenance stores & roof access coach
25196 ADB975927 Overhead Line Maintenance cable flat
25205 ADB975930 Overhead Line Maintenance cable flat
25222 ADB975622 EMU Barrier coach
25226 ADB975722 Overhead Line Maintenance generator & stores coach
25236 CDB977102 EMU barrier coach
25238 ADB975923 Overhead Line Maintenance cable flat
25243 ADB975946 Overhead Line Maintenance cable flat
25262 ADB975712 Overhead Line Maintenance stores coach
25281 DB975816 Underframes used for CCE staff & dormitory portakabin
25286 18286 TDB977496 Special instruction coach
25302 ADB975771 Overhead Line Maintenance office & staff coach
25318 18318 ADB977323 Crewe works diesel loco test train coach
25326 ADB977319 Crewe works diesel loco test train coach
25329 DB975829 Underframes used for CCE staff & dormitory portakabin
25338 TDB977173 Train crew training coach
25339 ADB977151 Crewe work test tain
25340 ADB975903 Overhead Line Maintenance cable flat
25343 ADB975798 CCE staff & dormitory coach for ballast cleaner
25353 ADB975763 Overhead Line Maintenance generator & stores coach
25356 18356 ADB977321 Crewe works diesel loco test train coach
25358 ADB975743 Overhead Line Maintenance office & staff coach
25388 ADB975723 Overhead Line Maintenance generator & stores coach
25396 TDB977174 Train crew training coach
25407 18407 TDB977407 MOD special instruction coach
25412 18412 TDB977584 Special instruction coach
25420 ADB975713 Overhead Line Maintenance stores coach
25422 18422 TDB977499 Special instruction coach
25429 DB975817 Underframes used for CCE staff & dormitory portakabin
25430 ADB975758 Overhead Line Maintenance stores coach
25434 ADB975711 Overhead Line Maintenance stores coach
25437 ADB975762 Overhead Line Maintenance generator & stores coach
25440 ADB975744 Overhead Line Maintenance office & staff coach
25461 ADB975767 Overhead Line Maintenance stores & roof access coach
25466 ADB975714 Overhead Line Maintenance stores coach
25477 ADB975766 Overhead Line Maintenance stores & roof access coach
25479 ADB975738 Overhead Line Maintenance stores & roof access coach
25480 DB975825 Underframes used for CCE staff & dormitory portakabin
25493 DB975822 Underframes used for CCE staff & dormitory portakabin
25494 TDB977237 MOD special instruction coach
25495 ADB975759 Overhead Line Maintenance stores coach
25497 DB975830 Underframes used for CCE staff & dormitory portakabin
25498 ADB975947 Overhead Line Maintenance cable flat
25507 ADB975800 CCE staff & dormitory coach for ballast cleaner
25567 TDB977129 MOD Special instruction coaches
25570 18570 TDB977408 MOD spechal instruction coach
25600 ADB975721 Overhead Line Maintenance generator & stores coach
25602 18602 DB977724 CE staff & tool coach
25623 CDB977100 EMU barrier coach
25664 ADB975741 Overhead Line Maintenance office & staff coach
25666 ADB975444 Crewe works test train
25667 DB975824 Underframes used for CCE staff & dormitory portakabin
25669 DB975821 Underframes used for CCE staff & dormitory portakabin
25695 ADB975734 Overhead Line Maintenance stores & roof access coach
25696 ADB975804 CCE staff & dormitory coach for ballast cleaner
25699 DB975823 Underframes used for CCE staff & dormitory portakabin
25729 18729 ADB977982 Brake Force Runner
25735 18735 TDB977653 Special instruction coach
25755 18755 TDB977419 Special instruction coach
25764 ADB975731 Overhead Line Maintenance stores & roof access coach
25807 18807 TDB977420 Special instruction coach
25811 18811 TDB977514 Driver training coach
25831 18831 TDB977458 Driver training coach
25840 18840 TDB977459 Driver training coach
25846 18846 TDB977515 Driver training coach
25852 18852 TDB977429 Special instruction coach
25859 18859 TDB977428 Special instruction coach
25860 18860 TDB977516 Driver training coach
25878 18878 TDB977517 Driver training coach
25884 18884 TDB977460 Driver training coach
25885 18885 TDB977461 Driver training coach
25953 ADB975866 EMU barrier coach
25973 18973 TDB977462 Driver training coach
25985 18985 TDB977463 Driver training coach
26002 19002 TDB977464 Driver training coach
26010 19010 TDB977465 Driver training coach
26020 19020 TDB977512 Driver training coach
Mk2a
FK SK Departmental Notes
13458 19458 RDB977914 Test Train coach
13462 19465 6352 Mk4 Barrier coach
13466 19466 TDB977662 MOD Special instruction coach
Mk2b
FK SK Departmental Notes
13476 19476 RDB977525 Brake force runner
13478 19478 6353 Mk4 Barrier coach
13481 19481 RDB977530 Brake force runner
13484 19484 RDB977528 Brake force runner
13485 19485 TDB977663 MOD Special instruction coach
13487 19487 RDB977529 Brake force runner
13491 19491 TDB977661 MOD Special instruction coach
13501 19501 TDB977656 MOD Special instruction coach
13505 19505 TDB977654 MOD Special instruction coach
13511 19511 TDB977660 MOD Special instruction coach
Mk2c
FK SK Departmental Notes
13518 19518 TDB977659 MOD Special instruction coach
13531 19531 TDB977658 MOD Special instruction coach
13557 19557 TDB977655 MOD 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[permanent dead link‍] 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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