There's an interesting thing above.
On wagons, but on nothing else, the flying snail was painted on initially. In the late 1950s they started using a stencil for both snail and numerals, but painted snails were to be seen around well into the sixties, just like stencilled snails lasted well into roundel times!
Above, we have a stencil on the photo, and the equivalent of a painted one on the model. Both ran together (as above).
It would be good, given especially the advent of Leslie's "H" van, if a run on transfer of the stencilled flying snail was available. Anyone?
I love this layout!