Really interesting one this. I've been looking into some of the older Dogman reports from the northern counties and quite a few of them do cluster around old rail corridors, particularly where lines were abandoned mid-20th century.
My theory, and I'm genuinely asking if others think this makes sense, is that the rail routes were often cut through remote woodland and moorland that would have already been ancient trackways or ley lines before the railways even existed. So maybe whatever these things are, they're following the same geographical pathways they always have, and the rail lines just happened to be built on top of existing routes.
Has anyone done any actual mapping of sightings against old Ordnance Survey rail maps? I'd love to see that data if it exists. Also wondering if there's any crossover with the ancient aliens angle here - some researchers have suggested these entities move along energy corridors rather than just wandering randomly. Does that resonate with anyone elses research?