![](https://coimages.sciencemuseumgroup.org.uk/425/877/large_thumbnail_1994_8783__0010_.jpg)
Permissive block instrument, Great Western/London & North Western Joint Line
![Permissive block instrument](https://coimages.sciencemuseumgroup.org.uk/427/50/small_thumbnail_1997_7908__0007_.jpg)
![Permissive block instrument](https://coimages.sciencemuseumgroup.org.uk/427/49/small_thumbnail_1997_7908__0003_.jpg)
![Permissive block instrument](https://coimages.sciencemuseumgroup.org.uk/425/881/small_thumbnail_1997_7908__0002_.jpg)
![Permissive block instrument](https://coimages.sciencemuseumgroup.org.uk/425/880/small_thumbnail_1997_7908__0012_.jpg)
![Permissive block instrument](https://coimages.sciencemuseumgroup.org.uk/425/821/small_thumbnail_1997_7908__0013_.jpg)
![Permissive block instrument](https://coimages.sciencemuseumgroup.org.uk/425/818/small_thumbnail_1997_7908__0010_.jpg)
![Permissive block instrument](https://coimages.sciencemuseumgroup.org.uk/425/819/small_thumbnail_1997_7908__0011_.jpg)
Tyers Permissive Block Instrument, Great Western/London & North Western Joint Line, No 8, for goods lines, probably from Barton Curve Junction Signal box, Hereford
Details
- Category:
- Signalling & Telecommunications
- Object Number:
- 1997-7908
- type:
- signalling instrument
- credit:
- Pearce-Higgins, Selwyn