Flanders mud flaps, post WW1 use.

[browningautorifle]

How often did they have to replace cars?

Working on a theory that I observed when teaching small arms under a SME from Warminster, the train wouldn't be shot. I see the sights are set at battle and should be set high if the small bore range was in use. The bullets go high. This is probably just learning to lead a target.

on an indoor range, are likely to be No2 MkIV*'s....aren't they?..........Odd.

I would have guess too, but perhaps just classroom instruction on "Leading targets"? I'm sure they wouldn't fire fullbore inside a building like that one?