
The table below shows the required locking positions.
A lever number or name followed by 'N' means the lever must be in normal position.
Followed by 'R' means the lever must be in reversed position.
Lever no. followed by * indicate locking for flank protection or overlap protection. Note that the position of these levers may sometimes be either normal or reverse, but the lever is locked in that position when the signal is cleared.
Signals in opposite direction giving direct access to the route as indicated must always be at danger and are not explicitly listed in the table below. Signals in opposite direction which do not give direct access but must be at danger for overlap protection are included, and are indicated by *.

Column "calling on" indicates if the signal can be cleared on occupied track. 
When signal requires 'caution', the signal must be kept at danger until the speed of the train is sufficiently reduced (approx. 10 mph).

------------------------------------------------------------------
Sign|  Route to | Endsignal | Req levers |Call On | Notes
------------------------------------------------------------------
    |           |           |            |        |  
  1 |   Main    |  2/5/10   | 11R*,14N*  |        | Caution if
    |           |           |   also:    |        |  02N and 05N
    |           |           |  03N,06N   |        |  
    |           |           |            |        |  
  2 | No.1 Plf  |   4/18    |  11R,12R   |        |  
    |           |           |   also:    |        |  
    |           |           |29* (N or R)|        |  
    |           |           |19N* if 29N |        |  
    |           |           |27N* if 29R |        |  
    |           |           |            |        |  
  3 | No.1 Plf  |   4/18    |  11R,12R   |  Yes   | Calling on
    |           |           | also 01N*  |        |  arm for 2
    |           |           |            |        |  
    |           |           |            |        |  
  4 | H'bush Rd |    -      |  29R,27R   |  Yes   |  
    |           |           | also 26N   |        |  
    |           |           |            |        |  
  5 | No.2 Plf  |     7     |11R,12N,13R,|        |  
    |           |           |    14N     |        |  
    |           |           |   also:    |        |  
    |           |           |  29N*,27N* |        |  
    |           |           |            |        |  
  6 | No.2 Plf  |     7     |11R,12N,13R,|  Yes   | Calling on
    |           |           |    14N     |        |  arm for 5
    |           |           | also 01N*  |        |  
    |           |           |            |        |  
  7 | H'bush Rd |    -      |  29N,27R   |  Yes   |  
    |           |           | also 26N   |        |  
    |           |           |            |        |  
 10 |   Yard    |    -      |11R,12N,13R,|        |  
    |           |           |    14R     |        |  
    |           |           | also 01N*  |        |  
    |           |           |            |        |  
 15 |   Main    |    22     |  12N,14R   |  Yes   |
    |           |           |            |        |  
 16A| Headshunt |    -      |    14N     |  Yes   |  
    |           |           |            |        |  
 16B|   Yard    |    -      |    14N     |        |  
    |           |           |            |        |  
 18 | H'bush Rd |    -      |  19R,29N   |  Yes   |  
    |           |           | also 26N   |        |  
    |           |           |            |        |  
 20 |   Main    |    22     |  12N,14N   |  Yes   | Calling on
    |           |           |            |        |  arm for 23
    |           |           |            |        |  
 21 |   Main    |    22     |    12R     |  Yes   | Calling on
    |           |           |            |        |  arm for 24
    |           |           |            |        |  
 22 | H'ton Ld  |    -      |            |        | Requires LC
    |           |           |            |        |  
 23 |   Main    |    22     |  12N,14N   |        |
    |           |           |            |        |  
 24 |   Main    |    22     |    12R     |        |
    |           |           |            |        |  
 25 | No. 1 Plf |  21/24    |  19R,29N   |  Yes   |  
    |           |           |            |        |  
 28 | No. 2 Plf |  20/23    |  27R,29N   |  Yes   |  
    |           |           |            |        |  
 30 | No. 1 Plf |  21/24    |  27R,29R   |  Yes   |  
    |           |           |            |        |  
------------------------------------------------------------------
    |           |           |            |        |  
    Groundframe                                        
    |           |           |            |        |  
    |           |           |            |        |  
 G0 | H'bush Rd |  28/30    |    G1N     |  Yes   |  
    |           |           |  also 26R  |        |  
    |Boiler Shop|    -      |    G1R     |        |  
    |           |           |  also 26R  |        |  
    |           |           |            |        |  
 G2 | H'bush Rd |    -      |    G1R     |        |  
    |           |           |  also 26R  |        |  
    |           |           |            |        |  

Notes :
Signal 22 is locked when train has been accepted from Hampton Loade.

 
Additional locking requirements :

-----------------------
 position  | requires
-----------------------
           |           
    19     |   29N
           |

Special lever :

 26 : releases groundframe (G0, G1, G2).
      Locks 04, 07.
      Locked normal by 04, 07.
      Locked reverse by G0, G1 and G2.

FPL :

--------------------------
    FPL    | locks switch
--------------------------
           |    
    11     |    12
    13     |    14
           |    
