Since yesterday's photo I've installed the baseboard for the new running lines, seen here with the clamps still in place while the glue dries. As it's a temporary(ish) part of the layout I've used existing chipboard offcuts, which explains the long, straight stretch in the middle. Normally I'd go for a gentle curve in such situations.
The view the other way shows the final gap that needs filling before tracklaying can commence - hopefully I can get the last piece fixed in place tonight, but I've only got ten clamps so I need to wait for the glue to dry first. This is the fiddle-yard area, as you might have guessed, hence the tracks stacked one above the other with no thought for scenery.
Finally, a view across the new area, showing the relationships between the different levels. At the bottom are the return loops for the lower fiddle-yard, which dip down to this lowest point in order to give sufficient clearance - I use US stock for checking things fit, as vehicles such as autoracks and double-stacked containers are much larger than UK equipment. Crossing over the lower loops is the rising main line that has just left the low level station area and is climbing towards the middle level of the layout. At the top is the new line - the temporary(ish) high level return loop.
Almost all of this forest of timber and trackwork will be hidden by scenery in the fullness of time. Only the high level, where the green BN stock is standing, will be visible - and only then if you look along the layout...
Currently On My Stereo: Black Sabbath - Sabotage