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
S3284 Arenig Map BQ86
SH831392
SRS diagram P124
S3285 Cwm Prysor Map BP86
SH791384
SRS diagram S807
S3287 Trawsfynydd Map BO87
SH714360
SRS diagram P124
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