I did a W from a Wills N,N1,U or U1 kit. A brass chassis, Romford wheels, H/D valve gear and plasticard. It ran on my EM layout "Brockley Green S.E.4." That has been sold but the loco is hiding somewhere.
There's bleared photo of it, on said layout.
Make me an offer I can't refuse.
I would if it was the right gauge !