+- IRSE Exam Forum (https://irse.signalpost.org)
+-- Forum: Study Packs and other exam material (https://irse.signalpost.org/forumdisplay.php?fid=90)
+--- Forum: External links (https://irse.signalpost.org/forumdisplay.php?fid=167)
+--- Thread: The Signalbox- discussion Forum (/showthread.php?tid=1118)
The Signalbox- discussion Forum - PJW - 07-11-2012
Discussion group / useful resource- mainly but not exclusively concentrating on history, especially traditional mechanical signalling:
http://signalbox.org/forum/index.php