Hi Jol,
I have been studying your propossed track plan, and I have one suggestion, that you move the crossover at the right hand end in towards the platforms as tight as possible, this may remind you very much of the way London Road was as a through layout, but it does mean that platform 2 can be bydirectional.
This makes better sense of the layout at the right hand end. It was rare for us to use the facility at exhibitions but could be fun in use at home.
Regards, Tony.