Severn Tunnel West

Technical drawing numbers
S1212/1Record of amendments
S1212/2Locking sketch
S1212/3Mechanical locking table
S1212/4Detection table
S1212/5Electrical control table
S1212/6Dog chart
S1212/7Lever leads
S1212/12Signal box diagram

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Severn Tunnel East  ——  This box   ——  Severn Tunnel Jcn East

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.