So thanks to some wonderful help in the prototype thread, arrangements for the stone terminal are coming together nicely.
Here's a mirrored version of Ardingly. From the perspective of my layout, you'd be looking from the middle of the backscene towards the front corner, which will be somewhere where the tall trees are.
To the right of the photo you can see the conveyor, shown in more detail below, this view would be from where the back where aggregates office would be, looking again towards the front/middle of the layout.
If my fiddle yard was scenic'ed, this is what it would look like from the 'other' side of the unloading shed:
All of these have trees in fairly high proportion, so I don't feel bad about using them for a scenic break on the left of the layout.
Wootton Bassett (not pictured but very similar to the above shots) has the same trees which get smaller and smaller and peter out into scrub just ahead of a siding - that would be a perfect space filler for the front of the layout, which as discussed has got proportionally bigger after the geometry change.
Lastly, Lincoln Coal Depot remained mostly unchanged until the late 80's so I will use that as inspiration for the Charrington's siding, albeit with a mobile conveyor instead of a chute: