Thanks guys!
Hat Guy: yeah, I just did a paint job on 'em rather than convert, 'cause I was lazy, but you're right, they should have gotten a proper treatment.
Mancha: I'm actually looking for a 1/50-ish scale (Corgi maybe?) bus like Bertie to use as their battle wagon, but will probably convert some engine (and a few troublesome trucks) for train depot battles. I'm also debating doing a militia based on the fire brigade of Pontypaddy (you can tell who gets to watch TV with the kiddies)!