Here is a railway safety poster by Leonard Cusden. I’ve posted before about Leonard Cusden and safety posters…just google, bagdcontext and cusden. This poster is from before 1940; so, it’s quite early for this kind of thing.
Also, you can look on my poster blog to find many more, non-railway, safety images
On an other note, I recently posted about Jerry Deller’s film, English Magic (2013). It’s terrific and well worth watching…my post made a connection between Deller’s film and an historic, and mainly British, strand of film-making. Quite a number of the films I mentioned made use of the railway…I’ve begun to think about film-time and railway-time…interesting!