There would have been examples of both scenarios ........ if the branch loco(s) had somewhere to bed down for the night then the coaches probably slept nearby but if the loco(s) came from a nearby big town they probably brought a train with them.
Hmmm ........ theoretically, you could get twelve tons of shoe boxes ( presumably flatpack ) into a van and they might stack high enough to provide quite significant leverage on the body end during a rough shunt ! ........ hmmmm
Relatively few 9' wheelbase open wagon types had ( or received ) vacuum brakes ...... and very, very few of those had timber underframes - none of which were LMS types. ☹️
Six locos bought by M.S.&.L from contractors Logan & Hemingway 1876-84 - variable wheel sizes 3'0'' to 3'9'' .......... some ( probably the same ) details in British Locomotive Catalogue.
... and the market for a 4EPB - which can run with / alongside existing models - is probably greater than any of those 'elsewhere' cousins which often ran only with their classmates ☹️
Of course a 4EPB is little different to two 2EPBs coupled trailer to trailer so Accurascale are not the obvious manufacturer ..... get yer finger out B !
Needless to say, the BBC News reporter trotted out with the usual "Why didn't they stop the trains?" - though, clearly, there WAS sufficient time for the police to attend ( where from ? ).
Well, the Southern and Western vans had conspicuous diagonals from new ............ the LNER kept theirs hidden but you can often see an 'X' of bolts !
Looks as described ( arched body on straight solebar ) in my copy of the book ..... though relying on nothing more sophisticated than Mk1 eyeball ............................... admittedly, there is a little distortion in the track below - but I think that's only a dipped joint.