Just checked and 9420 was based at Old Oak and Reading - so not the correct area, although probably she could have been seen elsewhere on occasions. She lasted 14 years (built 1950, scrapped 1964. The thing is, my layout is based in the preservation era, so I can be more flexible with what I run, though most of my stock I run is GWR and BR(W), and my station is mainly 1930s.
So I think, if 9420 was preserved, then she would be OK on my layout.
The layout is supposed to represent part of a branchline (not mainline, because of the tight curves) on the edge of South-West dartmoor, so the double track is supposedly only a small section of the branch, perhaps just because it is near the station. I guess a bit like the double track section near Bewdley on the SVR.
For my next layout I will use single track, probably peco bullhead, or if some locos struggle with that, code 75.
Just bought a couple of wagons to do, a Parkside beetle prize cattle van to make up, and an unpainted Dapol fruit van to paint. Quick question - I would like to paint the fruit van in brown, however after research I discovered the 8t mex fruit vans the Dapol one represents, seem to only be in grey. Do you know whether I could get away with it in brown, to match my GW horsebox and soon to be running w7 beetle prize cattle van?