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
S3230 Harlech Map BK85
SH580314
SRS diagram D266
S3229 Llanbedr and Pensarn Map BK84
SH578280
SRS diagram D266
S3234 Penrhyndeudraeth Map BJ87
SH613388
SRS diagram not available
S3287 Trawsfynydd Map BO87
SH714360
SRS diagram P124
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