Trains cancelled over fake bridge collapse image

Amazingly, no one seems to have actually checked that this picture was really "circulating on social media". I've been investigating for the past hour or so and can't locate a single public post or reference anywhere other than reposts of the BBC article.

Typically, postings that gain traction have many many reposts and though some may be deleted, there's a long tail of reverberation left behind. I can't find that at all here.

I wonder if the hoaxer just emailed it to Network Rail directly?

That would be a level of hoaxery I would actually applaud.