Hello there - I found out about this site while visiting the Warley show today and signed up after reading this thread just to say an enormous WELL DONE to everyone involved with this amazingly accurate and detailed layout. I spent longer looking at this layout than I think any other at the show and having seen the photos on here I see there is a whole host of incredible detail that I didn't even notice - the thought, observation and planning that has gone into every tiny detail of every aspect of this project is mind-boggling. From the little touches like the realistic graffiti on some of the rolling stock and the "Sausagefest" snack wagon (fnarr fnarr), the stunning representations of London streets at the "north" end and the petrol station and incredible shop interiors which are an absolute work of art, this really is something special. Well done to all the team involved.
(By the way, I was the one who joked about the petrol prices being unrealistic for London in 2016 - yep, that was me!)
(edit) Actually, can a witch put a spell on me and shrink me down to OO/HO scale? I want to live on the layout in one of those townhouses