Note to all - the Wagobox Light is not expected to be inaccessible in use (apparently there will always be a hole in the ceiling through which you can get to it), so they don't bother to claim BS 5733 MF compliance.If you want something which definitely complies with 526.3(vi) then you can go and buy a Wagobox + the "correct" connectors, or an Ashley J8xx, or the LINE product above, or any other product where the maker claims BS 5733 MF compliance.
So you can't use it in inaccessible locations where you might want a small enclosure with MF connectors inside.