Obvious question really, would the police / recovery guys have checked that the load hadn't all moved to one side of the container after the first time?
It was mixed waste and would have been over a weighbridge after loading. It certainly wasn't properly secured to the recovery trailer to have come off it.
That's a very busy roundabout with pedestrians around most of the time too.
I think the key to the second problem (and maybe the first) is the axle that has come adrift.