I was thinking the same thing, featuring one of the first series of W&LR express locos, a Stothert and Slaughter outside cylinder 2-2-2, a class definitely on my 'to model' list!
Ernie Shepherd, in his book on the WLWR states the drawing I attach is incorrect in as much as the rear carrying wheels should apparently have outside bearings, but doesnt provide a source, would anyone know what this is in reference to?