 To avoid stopping passenger trains in tunnel sections, a relaxation of the rules was in force permitting the clearance of the home signal (protecting entry to a station area) without bringing the train quite or nearly to a stand.The consequence of this was that drivers rarely encountered any home signal at danger, and some were accustomed to fail to look out for it.Many of the signals were of miniature arm or disc type, and the tunnel signals were oil lamps of inconsistent performance.