I like the inside-framed ex-GWR Siphons in BR blue as parcels traffic and found a bargain Lima model yesterday in GWR brown. I have Bachmann BR Mk1 bogies that will suffice until I can source the correct pattern. It's had a bath so I took a 'before' photo. The screws holding the body on were difficult to access behind the bogies but they're out now without any damage.

As the lettering needs removing I tried meths on a cotton bud, but it took the paint off and left the shirtbutton logo, so I scratched the markings off with a blade and decided to strip all the paint and make the most of the fine moulding of the louvres.

I've shown an original bogie on the left and a Bachmann Mk1 on the right.