Analysis of information sources in references of the Wikipedia article "Green Line bus route 724" in English language version.
All the Country Area and Green Line routes were meanwhile being converted to one-man operation, passengers paying the driver as they boarded, the first Green Line one-man service being the 724. This was a new route introduced in July 1966, using one-man RF coaches from the outset. Running between Romford and High Wycombe as a limited-stop cross-country facility, it proved very successful in contrast to the earlier 727 experiment.
