It looks like some sort of tap off connector, possibly for overhead supplies.
There are at least 2 cores, labelled 0 and 1 with another block to the left, probably clamped around the "0" core.
Can't see it being at floor level on a 240v supply in the U.K
Stripped conductor in an IPC line tap with its shear nut distorted but not sheared. Looks like whoever fitted it wasn't too familiar with the finer points, so perhaps the arrangement of cables and the location shouldn't surprise us too much. Nor would I be surprised if it were part of the supply arrangement for an overhead agricultural installation, but really it could be anything. Is that the ground underneath or just a flat roof? Could be some kind of CNE link on a mural supply. Sosaaa, spill the beans!
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