The Signalling Record Society
RailRef Line Codes JN
Signal Fact 59
The Great Western Railway started developing its automatic train control (ATC) system with a trial in 1906.
The system was installed across the Great Western Railway between 1910 and 1930.
Great Northern & Great Eastern Joint Railway (GER, GNR)
This page should be regarded as “Work in Progress”. The webmaster will welcome additional information for this page.
In the list below the information is set out in tabular form, spread over four columns. The column entries are -
| RailRef | The Line Code used in RailRef system. |
| Line Detail | The principal locations included within the Line Code. They are arranged in 'down' direction order. Locations shown are primarily stations and junctions to allow easy cross check against published atlases. Signal box names appear in italics where these are 'intermediate' to stations or have been shown to facilitate links from other pages on this web site. The inclusion of a station or junction name does not imply that there was always a signal box of that same name! |
| SBR | The section reference used in the relevant Signal Box Register published by the Society. |
| ELR | The corresponding Engineer's Line Reference(s). This will be blank for railways that never came within British Railways terms of reference. It will also be blank where British Railways had no surviving responsibility for infrastructure at the time the ELR system came into use. |
Milepost Mileages
Mileages seem to have been primarily from Huntingdon to Black Carr via March as shown in the GNR Gradient Book.
The GNR included an item in its weekly notice for 4 to 10 April 1897 headed "Remeaurement of GN & GE Joint Lines". This indicated that the lines had been remeasured and new mileposts were being put in place from zero at Huntingdon South Junction and running thence to Black Carr supeseding the old branch mileages in the area bounded by Huntingdon, St Ives, Needingworth, March, Whitemoor, Spalding, Pyewipe Junction, and Sykes Junction.
The existing posts between Spalding and Sincil Junction were being brought southwards from 8 to 12 chains.
The avoiding line at Sleaford would have mileposts from Sleaford South Junction.
The avoiding line at Lincoln would have mileages from Greetwell West Junction.
No Joint line mileages would be placed on the GER at St Ives or at Marsh or on the GNR at Spalding, Sleaford and Lincoln.
Mileages in the lists below date mainly from 1897 in consequence.
| RailRef | Line Detail | SBR | ELR |
|---|---|---|---|
| JN001 GE071 GN041 |
Huntingdon North GNR - St. Ives Junction
0m00c Huntingdon South (No.1) Junction GN040(1) originally Huntingdon Article: Steam Days 2013 August. |
||
| JN010 GE072 GN042 |
Needingworth Junction - March South Junction datum Huntingdon 7m38c Needingworth Junction GE070GN Gradient Book shows mileages from Huntingdon. Mileages above from GER Diagram Book of 1919. 1889 OS map shows mile posts from St Ives. Article: Steam Days 2013 August. |
NJM | |
| JN011 GE073 GN043 |
Somersham Junction - Ramsey datum Somersham Junction JN010(1) originally Ramsey High Street |
SOR | |
| JN012 GE073c GN044 |
Chatteris Dock Branch
Chatteris Dock Junction JN010 |
||
| JN020 GE090 GN091 |
Grassmoor Junction - Spalding South Junction GNR datum Huntingdon South Junction 25m07c Grassmoor Junction GE082(1) originally Crowland MSG2: Grassmoor Junction - 26m53c (regional boundary) MSG3: 26m53c - Spalding South Junction 1888 OS map shows a 6mp from March (March North Junction?) just before the later position of the 31mp. Article: Steam Days 2013 August. |
MSG2 MSG3 |
|
| JN021 GE091 |
Murrow Curve
Murrow Junction JN020 |
||
| JN030 GE092 GN092 |
Spalding North Junction - Sincil Junction datum Huntingdon
44m52c Spalding North Junction GN090 44m65c Park Road 44m74c Mill Green 45m42c Blue Gowts No.78 LC 46m00c Cherry Holt No.80 LC 46m33c Pinchbeck 46m46c No.84 LC 46m59c No.85 LC 46m66c Flax Mill No.86 LC 47m22c Bearty Fen No.88 LC 47m68c Beech Bank No.93 LC 48m09c Water Drove No.94 LC 48m31c Cheal Road No.96 LC 49m21c Gosberton 50m19c Brewery Lane No.104 LC 51m10c Quadring 51m47c Church Lane No.113 LC 51m58c Golden High Hedges No.114 LC 52m29c Malting Lane No.116 LC 52m69c Donnington Road 54m43c Pumphouse No.122 LC 55m26c Blotoft Siding 56m56c No.135 LC 56m77c Barnes No.137 LC 58m21c Helpringham 61m71c Beavers No150 LC 62m13c Sleaford South Junction JN031 63m47c Sleaford North Junction JN032 63m49c Bone Mill Lane No.254 LC 64m20c Holdingham Lane No.259 LC 64m68c Leasingham Moor (Whitehouse Farm) No.262 LC 65m66c Ruskington 68m44c Digby 69m33c Rowston Organ Road No.273 LC 69m59c Rowston No.275 LC 70m48c Timberland Road No.278 LC 70m51c Scopwick & Timberland Martin Road SB LC 73m02c Blankney (Methringham Moor Lane) No.287 LC 73m03c Blankney & Metheringham 73m43c Robinsons No.291 LC 73m62c Ox Pasture Lane No.292 LC 74m58c Nocton & Dunston 75m70c Howards No.295 LC 76m60c Potterhanworth 78m79c Branston & Heighington 81m24c Greetwell East Junction JN033 82m18c Sincil Bank Junction GN260 SPD1: Spalding - Sleaford South Junction SPD2: Sleaford South Junction - Greetwell East Junction SPD3: Greetwell Junction - Sincil Bank Junction GER 1919 distance book implies miled from Liverpool Street. OS amp 1890 supports miled from Huntingdon and current Quail states from Huntingdon South via March. Article Railway Magazine 2015 June. Article: Steam Days 2013 August. |
SPD1 SPD2 SPD3 |
|
| JN031 GE093 GN093 |
Sleaford South Junction - Sleaford East Junction GNR
0m00c Sleaford South Junction JN030 |
SSE | |
| JN032 GE094 GN094 |
Sleaford West Junction GNR - Sleaford North Junction datum Sleaford South Junction 1m34c Sleaford West Junction GN264 |
SNW | |
| JN033 GE095 GN095 |
Greetwell Junction - Pyewipe Junction (Lincoln Avoiding Line)
0m00c Greetwell West JunctionLIA: Greetwell Junction - Pyewipe Junction BHP: Boultham Junction - Pyewipe Junction post deviation works Mileages from Greetwell taken from 1978 Appendix. 1887-1890 series OS maps show mileposts from Huntingdon South Junction continued through to Pyewipe Junction Article: Steam Days 2013 August. |
LIA BHP |
|
| JN034 GE096 GN096 |
Boultham Junction - West Holmes Junction
32m40c Boultham Junction JN033 MR614Mileages are post BR deviation works, datum Nottingham London Road Junction. |
NOB2 | |
| JN040 GE097 GN105 |
Pyewipe Junction GNR - Trent East Junction GCR datum Huntingdon South Junction via March 84m14c Pyewipe Junction JN033 GC110(1) originally Marton. (2) temporary (484093 385359) in connection with Hatfield landslip (2013), never opened for traffic. (3) originally Gainsborough, later Gainsborough North. (4) originally Trent South Junction. 188x OS maps show mileposts from March. 1890 OS maps show mileposts from London, continuing the series from GN100. Article: Steam Days 2013 August. |
SPD3 | |
| JN042 GE097c GN106 |
Gainsborough Wharf Branch datum Huntingdon South Junction via March 98m09c Gainsborough Wharf Branch Junction JN040 |
GLY | |
| JN050 GE098 GN275 |
Trent West Junction - Black Carr Junction GNR datum Huntingdon South Junction via March 98m69c Trent West Junction (1) GC170(1) originally Trent North Junction SPD4: Trent West Junction - Bessacarr Junction BCB: Besscarr Junction - Black Carr Junction 188x OS maps show mileposts from March. Article: Steam Days 2013 August. |
SPD4 BCB |
|
| JN051 GE099 GN276 |
Stockwith Branch
Stockwith Branch Junction JN050 |
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