As the picture above shows, the factory and yard is largely complete now. The Metcalfe buildings have had a fair bit of work (painting visible card at the corners etc.) but they do look good, I think. The wall and yard gate are made using the extra brick-paper and doors supplied with the kits, the gate-posts are styrene and painted to match. A gate across the siding will be fitted at some point.
Mike Beard pointed out that the cobbles should run parallel to the tracks, however being a cramped and oddly-shaped site this would have been very fiddly to arrange, plus the track is not quite straight. However the cobbles are parallel to the buildings and those between the rails parallel to the rails, I think it looks OK. And I took great care to ensure the surface is just below the rail tops - even outside the rails! They were painted grey with enamels and then given a couple of washes of green/black acrylic, wiped away to represent dirt between the setts.
Both pictures show the completed backscene, using Townscene backgrounds. Some of the foreground buildings are mounted on card and stand slightly proud of the backscene proper. Any edges are blackened. They do seem to blend well with the buildings as I had hoped, although the town is looking larger and more important than I had envisaged!