[Idle chatter] Of course, it can be termed LMS Princess Elizabeth, but it's interesting to consider the loco belonged to (or at least ran in service for)
a) the LMS for 15 years
b) BR for 14 -15 years
c) private preserved owners for
50-odd? years
And some odd types who like copper capped chimneys are wont to argue it wasn't really even LMS, but one of their 4-6-0s painted red with a couple of wheels added.