Hopefully enough description in this so Brian can understand at it's all pictures and a video.
So a socket is not working and when I plug in the socket tester there is no response at all but the volt stick is live at all points on the socket.
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So I remove the socket front and inside I find the earth is not connected.
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I reconnect the earth and the socket tester says no neutral (as expected). I trace the cable to this broken JB.
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Which has three earths twisted together and not in a terminal plus the earth core of a flex wrapped around the screw holding the JB to the wooden frame. There is also the fact that someone had removed a cable at some point buy using snips instead of a screwdriver. And the flex fed an unearthed socket.
No neutral at the JB so I trace the incoming cable to this socket
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The neutral has fallen out of the socket and the backbox has rusted away to nothing.
So time to turn the power off at this nice fuse board.
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Just keep your fingers clear of the exposed live parts as some bits of the cover are missing including one over the main switch.