1940 interested me as I cand incorporate some military figures and have aircraft too (perhaps blimps as well - will disguise the bubbles on the backscene).
I'll be using DCC with e-link and Railmaster software on an old XP PC. Had a stash of polystyrene slabs in one of our sheds (long story) and saw an opportunity to make use of them for building up basic contours. Will be using modroc on top.
Here's a few pics of the thing so far (in my 'shedquarters'). Nothing is fixed yet and most of the Metcalfe models are not going to end up where they are now (excpet for perhaps the church). Its an L shape 12ft long and 6ft wide at the widest point. Here's the left hand side:

The middle (the viaduct will be over a canal). The one and only station will be along the back 'shelf':

Right:

Out of shot on the right is the (yet to be built) other half that will complete the loop and include fiddle yard, etc.