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
S 597 Flax Bourton Map AM120
ST511698
SRS diagram P288 (old box c. 1950, new box c. 1958)
S 701 Nailsea and Backwell East Map AJ119
ST478692
SRS diagram D82
Prices are shown here.