ChatterBank6 mins ago
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Advise your neighbour that he should contact his electricity supplier. (People who try to find external causes for their problems are often just scared of the costs of putting the problem right. You should assure your neighbour that, because the problems aren't on his side of the fuse box, he won't have to pay anything).
I had the same problem in my house.
It turned out that the mains electrics hadn't been checked in over 50 years as the lanlord had messed with them over the years which is illegal so he refused to call manweb out to sort the problem out.
it got worse and i called them myself out of frustration. they just fitted a new box at no cost, they were shocked at the state of the old box and wires but it has been fine ever since.
if he is elderly and has lived there a while he probably hasn't had them checked either.
tell him if he doesn't call them, you will, as an electrical fire would affect your property as much as his and you're not prepared to sit back and wait for an accident to happen.
I'll bet he calls someone - even just a local electrician to check the circuits