I managed to put in a couple of hours work the other evening to assemble the parts of number 12 into a body shell and fit the chassis and roof so it looks like a carriage now.
Before I could do that, however, I had to make up the corridor connections on the guard's van end which are rather unusual and more of a challenge to model that normal.
Perhaps because of the heritage value of the carriage / van (?) the usual side guards formed of a plank of wood with a folded rubber section are not mounted directly to the woodwork at the end of the carriage but instead are hinged on metal frames so they sit clear of the body work.
I don't know the reason why. I wonder if it is to make them easier to remove, or the mounting points less obtrusive, so the carriage can be turned out with a more heritage appearance when required?
Maybe someone who knows could enlighten us?
Anyway, the main issue for me was how to replicate this feature?
I decided in the end to drill holes into the styrene and insert short lengths of 0.5mm brass wire and drill more holes in the end of the carriage, very carefully so they lined up accurately, so they would sit proud of the body shell.
I also managed to find the time fit the roof skin to number 11 as well.
Interiors next, I think.