I really need to get my hands on HAVBs book (I read a copy many moons ago, but after about six months, the library wanted it - and the volume on Leader - back!). A few things have always puzzled me though. In the wake of Sevenoaks, were any modifications made to the Maunsell moguls? Or any restictions imposed on either them or the Billinton K class? With Bulleid being parachuted in from Gresley's demesne, I wonder whether any early concerns surrounding the LNER pattern pony truck, as fitted to the P2 and V2 had reached Ellson's ears? AFAIK, the first derailment of a V2 atrributed to the pony truck design wasn't until 1946 and the first suggestion of any redesign for the P2 by A1SLT for No.2007. Given his sacrifice of a Marsh atlantic and later experiments on an Irish mogul, I'm a wee bit surprised Bulleid didn't find a way of trialling a K-H truck on some unsuspecting occupant of Eastleigh's scrap line. Perhaps time and the strings attached to wartime budgets were issues? I do hope @S.A.C. Martin's next work can throw some light on this chapter .... but the 2-8-2 still won't make my personal fantasy new-build list!