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
  Adderley Map CL87
SJ663401
SRS diagram not available
  Market Drayton Station Map CL86
SJ672348
SRS diagram not available
  Silverdale Junction Map CL86
SJ673352
SRS diagram not available
  Tern Hill Map CL85
SJ634321
SRS diagram not available
Prices are shown here.