So a bit of backstory, we live in a "rough" area & I haven't seen my neighbour in over a month (6 weeks ago is when our cctv last saw her) which was also the same time someone spray painted the word "grass" on her window. I know she's involved in drugs, as most people round here are, so we assumed she had told on the local dealer and been ran out of her house. We mentioned it to the housing officer of our housing association the other day that we hadn't seen her in a while and we were concerned and she didn't know anything about it. And now in the last couple of days there's been a weird noise coming from her house - sounds like an old printer that's ran out of ink on repeat, but only at certain times of the day, and now it's a continuous humming sound like a hair dryer. I'm 100% certain she is not in that house, what the hell could the noise be?! And should I ring the non emergency police number or would they just tell me to contact the local council?