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Accessibility of joints only entered the regs in 2012 though, so you could expect to find a lot of these around. At least it was mechanically protected by the tiles. There are a few methods for joining that in situ that meet the regs if you are going to tile over it again.
Those wires are not connected to anything, mainly because we couldn't get a stable earth for the socket to which they lead.
I might now put a socket where that rats nest is, given that we have a solid L/N/E back to the consumer unit (when re-attached).
Accessibility of joints only entered the regs in 2012 though, so you could expect to find a lot of these around. At least it was mechanically protected by the tiles. There are a few methods for joining that in situ that meet the regs if you are going to tile over it again.