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
S3198 Llanidloes Map BS72
SN957845
SRS diagram P277 (c. 1957)
S3200 Pantydwr Map BS70
SN983747
SRS diagram P277 (c. 1951)
  Tylwch Map BS71
SN970802
SRS diagram P277 (1899)
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