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
  Aston Tirrold Map BV116
SU562885
SRS diagram not yet available
S 163 Cholsey Map BX115
SU584860
SRS diagram P301
S 164 Moreton Cutting Map BU117
SU549892
SRS diagram P267 (1937, 1960)
S 174 Wallingford Map BY117
SU601894
SRS diagram S792
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