Thanks Craig, I had found the Cambrian one but my eyes were closing last night so never posted! I know my work is no where near yours, but it has made me (and no doubt others) up my game a bit with wagon building, although with these old kits I've pretty much built them as intended. The TIC wagon was built about 10 years ago and I now try to finish the interiors a little better!
Iak, The ones in the box aren't to mysterious, I'm pretty sure they are BR 12/13t Vans, they are Parkside kits so should be easy to identify, but there's no pressing need for them at the moment.
One thing I like about the 3H kits, especially the vans, is that the body sides are quite thick, which gives plenty of material for the solvent to get hold of.