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
S2439 Caldicot Junction Map AL139
ST488876
SRS diagram P286
S2438 Portskewett Map AN140
ST505882
SRS diagram P286
S 629 Severn Beach Map AQ137
ST540848
SRS diagram P230
S1211 Severn Tunnel East Map AQ138
ST549852
SRS diagram P193 (inc WW2 IBS)
S1212 Severn Tunnel West Map AL139
ST477877
SRS diagram P193 (inc WW2 IBS)
S1213 Severn Tunnel Junction East Map AJ139
ST465876
SRS diagram B128 (1936) L201 (1958) P269 (1960)
S1216 Severn Tunnel Junction West Map AI139
ST453875
SRS diagram X42 (1960) L148 (1945)
S1215 Severn Tunnel Junction Middle Map AJ139
ST459876
SRS diagram J3 also J100 (1955)
S1219 Undy Crossing Map AG139
ST440871
SRS diagram D521 (1941)
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