So, after a few months of doing nothing, I started fiddling with the layout again.
The fiddling turned into some major surgery (as always), and that then to some major wiring.
Having returned to work for a few more weeks wizzing up and down the ECML its on hold, but it does give me change to ponder the next stage.
At present I have an 8 x 2 section, BR 60s steam shed, roughed up etc. Next is what to do.
The layout space is now to go into an L shape, measureing approx another 6 x 2 sect