It was as long ago as that? I can remember you attempting to trace the source and one of your neighbours (the church organist?) allowing your to test by turning off their incoming mains supply.
I'd have to look back at my posts to be sure, but it was a while ago!
I'd forgotten that I got my neighbours to turn their power off as well
The noise on my radio was particularly strong near where the mains cable entered their house, so I wondered if they were also the source. They weren't.
The noise stretched from neighbour on other side (it got weaker there) to 5 or 6 houses up the road, but also was easily detectable whilst walking behind the row of our houses, so could have been from a side street. Much weaker on the opposite side of the road though.
I noticed that, when the interference wasn't present, I could hear the hiss of DSL by holding my radio near the "Post Office" inspection cover in the pavement. When the interference was present, doing the same would get a loud buzzing sound from the radio
Happy / frustrating memories
Ian