Managed to get a couple of sets at the Milton Keynes shop on Tuesday. Have been building the coaches to all run on Jacobs. The photo below shows progress, the jacobs on the left is from the set, the one on the right I have managed to bodge together. Some of the colours are slightly different but not really noticable in real life.
The other mod is to the valance between the bogies. The coaches are supplied with a couple of 2x2 orange tiles to fill the holes in the baseplate which I used together with some 2x1 grills.