I didn't see the answer to this question:
"is it possible that my roof is acting like an amplifier and pushing the sound out of the eves ? I nearly pulled the plug last night 6 weeks in"
I too wonder if that could happen. Seems possible to me. And cities in the U.S. have all kinds of noises leaking out from them, the byproduct of our technology, but I'm growing used to it. I get interstate motorway noise the worst, especially when the wind blows my way. And there's always the water pumps and sewage pumps, and the a.c. and such.
I had to deal with the US variant of 'chavs', the 'thugs'. My son ran is mouth and these three thugs show up one evening, shouting aloud "I smell weed here" over and over as they came on my property, right up my driveway. I confronted them but backed off and tried instead yelling for my neighbor, who didn't appear. I backed into the house. I saw them looking in thru windows. Maybe they had to keep moving that evening or some other reason, but they went around the back and kept going. A few nights later however they returned and broke into my rear room, which had become a filled storage room very quickly, but was a grow about 6 months earlier. I assumed the word was 'out there' once my son had said something, these characters were just getting the news. They threw some rocks thru my windows and left, fortunately to not return so far. They looked to be somewhere in the 13-17 year old range.