Being in such a prominent spot as Hampton Court, there must be other mentions and photos of it. I'm curious about that wheel construction. It's not like a cartwheel with spokes, but it IS ringed in iron (an "iron tyre" put on by a blacksmith). It seems, this sort of spokes-to-blocks form, could be really strong for this sort of use by one person.
Here is one, showing bags in it, and linking (if you click it) to a small site called "Wheel Barrow Wheels."
I don't know who took this photo.