it was decided to rebuild 4942 "maindy hall" from scrapyard condition (there being another eleven members of the 4900 "hall" class in preservation). this is appropriate as the original 4900 class prototype of 1925 was converted from 2900 class engine "saint martin". it was also decided (like 60163 "tornado") to number the locomotive as a new member of the class, sequential to the highest-numbered original saint, no.2998, "ernest cunard".