A bit of an update as it has been a while.
As can be seen if looking here, progress on the Woolwich/Charlton P4 layout has sadly stalled for the time being. This is mainly due to working on something else to get used to working to P4 standards and also due to funds (or lack of).
However, I have been working on a smaller more manageable project to learn some things prior to continuing on the Woolwich/Charlton layout. More on that in a moment.