Wow! I didn't know about the Bosie story!
I've seen some of those pictures before--probably here. But I've never read the story.
It's clear from the first picture that the tail is still inside the van, and from this picture it's clear that they are in trouble.
I don't know about the Two Moors Festival, but most concert venues have a loading dock, and that's definitely how this piano should have been unloaded (imo). Even rotating it on the truck's platform would have been difficult given its size.
Hindsight is 20/20, but in the future, perhaps the tail should be to the rear--if it had been, it could have overhung the lift by a lot more than the keyboard end, and perhaps cleared the van walls for pivoting (but could still be pretty squirrelly...). But then if it rocks, there'd be no platform under it to stop it from flipping off. I think the piano is simply too large for the platform lift.
Thankfully, nobody was hurt! The guys in this photo are right in the direction the piano fell!
Just goes to show you that moving a piano can be complex and dangerous, even for the people who do it every day.