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 184 Aldermaston Map DJ43
SU601673 		SRS diagram P103
  Burghfield Map DL43
SU693686 		SRS diagram D103
S 181 Calcot Map DL44
SU668713 		SRS diagram S147
S 185 Midgham Map DI43
SU572666 		SRS diagram P103
  Mortimer Map DL42
SU672640 		SRS diagram D225
S 179 Oxford Road Junction Map DM44
SU702733 		SRS diagram L18
  Pound Green Map DM44
SU694695 		SRS diagram D103
S 180 Southcote Junction Map DM44
SU697718 		SRS diagram B56
S 182 Theale Map DK43
SU644709 		SRS diagram D10
S 183 Ufton Crossing Map DJ43
SU616688 		SRS diagram D10
Prices are shown here.