OK, so it's back to the cobble scribing, and now I have to scribe the area on the opposite side of the siding. This is the main area where road vehicles arrive, having come down the approach road to the goods yard, and is a pretty large space, if considered purely in cobble-scribing terms...

So, I was always going to depict the majority of the area has having been (rather crudely) tarmacked over, with just a small(ish) are of cobbles remaining immediately next to the track (the reasoning being that they would have wanted to keep cobbles around the track area itself, in case of needing to change a few sleepers or other PW maintenance).

In some areas, the tarmac will have come adrift, and the original cobbles left showing below. This is the progress so far:

Edit - a couple of additional views that I forgot to upload...

This shows the 'edge' of the tarmac, scribed on with a curved scalpel blade (No.15), prior to the actual cobbles being scribed:

This shows the overall plan. The area inside the blue line, between that and the siding, will have full cobbles, with just a few more patches of 'broken tarmac' outside of that. The peripheral edges of the white filler may disappear under scenery in due course. I will also probably make the blue line straighter and parallel with the siding for much of the remainder of it's length, where I haven't yet scribed, to represent an attempt by the railway authorities to tarmac that part of the yard in a neat-ish fashion: