In terms of accidental folk-art, I think these British Rail leaflets from 1970 should be filed alongside the Cornflakes packet that is featured in the Own Label: Sainsburys Design Studio: 1962 – 1977 book by Jonny Trunk.
(Although strictly speaking I might say to file the British Rail leaflets nearby to the Sainsbury’s Corn Flakes, say under Accidental Folk-Art/Hauntological Precedents.)
(File post under: Other Pathway Pointers And Markers)
Local Places Of Interest:
Day #213/365: Artifacts of a curious mini-genre (and misc.)