What evidence do you have that it is directly connected to the main fuse board/CU? It could be fed from somewhere else. If you do not have any test equipment, you will need some.
As above if you do not understand the very basics and do not have the required test equipment and the skill set to establish where the power is supplied from, it would be foolish not to employ someone with the above, to carry this work out for you.
It could be a simple disconnection or could be more complicated.
We had exactly this situation when we bought the house, live wires going 30m to the green house and shed, I just pulled the fuse from the socket circuit and it was dead. Then I went round unscrewing the sockets at the back of the house and soon found one with 4 cables coming in (including a flex) the flex was going directly to a conservatory light fitting.
So I disconnected the two and terminated into some chock block and all was well again.
Unfortunately it wasn't, as it turned out one of the other cables was a spur to a triple socket in the conservatory, meaning the original socket was also a spur.
You needed this website, were you have asked questions to and been given advice by both men and electricians.
Also if you used the screwdriver as a test instrument to identify and prove this circuit, you have been very foolish.
John D v2.0 thanks, I have traced the wire it was armor cable and went back to the mains supply box into the house, I switched off the outdoor fuse and unscrewed the complete supply box which was very damp and went at it with an old insulated screwdriver my elderly mother users and took out the three wires all burnt and than screwed the box back up and pulled the wires out the box from the loft. Who needs an electrician or a man lol all done. X Tully.
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