RISC OSMap of G.W. SignalboxesRISC OS
http://www.svrsig.org/gwmap/GWMap.htm
Sxxxx numberSignal Box nameView on map squareOther information including SRS diagram number
S1257 Glascoed Map EF201
SO337021
SRS diagram L158
S2504 Usk Map EJ199
SO375012
SRS diagram L230
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