Yes just bad luck, not connected.
As to name, like calling an air velocity cleaner, a vacuum cleaner or Hoover, it does not create a vacuum and there are other makes as well as Hoover, but very few would call it an air velocity cleaner.
The distribution unit can be type tested when it will be called a consumer unit, and there is a make of consumer unit called fuse box, and even today one can use fuses, normally for semi-condutors protection, but even the Part P law called them consumer units instead of distribution unit which would have covered all.
So in real terms does not matter what it's called as long as we know what your talking about. Could call it thingy in the picture.