Taking onboard the comments on the mound I added the best part of another couple of inches to the top. I also altered the shape to I hope better match the rather pointed shape of the original. I've added an initial layer of static grass and made a couple of trial little bits of wall from Sculptamold (I just wanted to see if I could make a wall with it, I need to get the shapes better)
I've got the goods shed bedded in a bit better (obviously still needs windows, capping stones etc. etc.) and also added the 3d printed yard crane in place. I don't think it looks too bad.
There are still lots of flecks of polystyrene which seem to defy the hoover repeatedly!
Looking in the other direction the cattle dock/grain loader is beginning to look more complete. The back siding got some static grass as it appeared to be pretty weedy by the mid 1950's. The join between the back of the layout and the wall will mostly be a line of bushes.
Now another question. This colour image of the goods shed seems to give the appearance that part of the brick wall was much paler than rest of the building, almost as if it had been whitewashed. There is no remains of the colour now on the building except perhaps just to the left of the top of the doorway. Any ideas what/why? I almost wondered if it was for sighting purposes but it never acted as the background for a signal.