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
  Blaencwm Colliery Sidings (L.M.S.) Map CK207
SRS diagram not available
S1937 Colbren Junction Map CQ208
SN850113
SRS diagram not yet available
S1927 Crynant Map CN203
SN795048
SRS diagram P152 (1938)
S1822 Glyn Neath Map CU203
SN868056
SRS diagram P263
S1974 Gurnos Junction (L.M.S.) Map CK206
SN773094
SRS diagram S860
S1933 Onllwyn Map CQ207
SN840104
SRS diagram B111
S1823 Rheola Map CT203
SN862052
SRS diagram P263
S1930 Ynisdawley Map CO205
SN815082
SRS diagram P152
S1980 Ynisygeinon Junction Map CJ205
SN764074
SRS diagram D123
S1982 Ynisygeinon Sidings (L.M.S.) Map CJ204
SN755065
SRS diagram D123
S1979 Ystalyfera (L.M.S.) Map CK206
SN770090
SRS diagram not available
S1949 Ystradgynlais Map CM206
SN792095
SRS diagram not available
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