| Technical drawing numbers | |
| S277/1 | Record of amendments |
| S277/2 | Locking sketch |
| S277/3 | Mechanical locking table |
| S277/4 | Detection table |
| S277/5 | Electrical control table |
| S277/6 | Dog chart |
| S277/7 | Lever leads |
| S277/12 | Signal box diagram |
| ‹‹UP Click below to move to adjacent box DOWN›› | ||
| Challow | —— This box —— | Knighton Crossing |
The diagram below is a low-resolution version to indicate the content: a full-resolution 'pdf' file will be published on a CD-ROM entitled 'Great Western Railway Signal Box Diagrams - Section B'. For availability and ordering information, click on the image below.
This page last updated on 8th February 2010.