One other thing, which I have discussed with a few here, is the use of CH 4-way Portholes in some cases in the UK. Basically, our junctions were typically one pole with two back-to-back lanterns per corner, on the nearside. This was varied in Cities so there was 3 lanterns per direction, typically in a typically Aussie kind of way, which is very very possibly where they get it from.
For this reason, it was feasable to but up 4 way signals with N and S getting lenses, and E and W getting blank doors. I believe these were not very common in reality, however were something that was not hard to find. For now, only pictures remain, from what I am aware, and the lone example in an Industry Museum in Leeds, which doesn't have lenses or innards and in in a prettey sorry state.
I know that the ones in the pic aren't CH though, I dont think.
