I am about to replace an old consumer unit (fuse wire) with a modern
one. I have no worries but all other systems I have seen have the
electric supply coming into the house with a single sealed electricity
board fuse box.

This one however has that but then the output goes into another 2
electric board sealed fuse boxes. Am I right in assuming that one is
live and the other is neutral? Each feeds into the old distribution
box. It is an underground supply, and earth is connected to the sheath
of the incoming cable.

TIA
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