Long story long:
We've lived here 4 years (upstairs flat), they live downstairs, 2 kids. They've always played loud music, and a few weeks ago I finally had enough and reported them to the council.
Since then the music has stopped (even though they told the guy from the council that they didn't do it), but they've taken to banging their door 3 times every time they go in/out, and for a while now their kids have been rollerskating indoors. At least that's what it sounds like, could be a skateboard or something. They have a tiled floor in their corridor, and it's really really loud in my flat, lots of crashing and banging also goes along with it. They do it at the same times each day, when the youngest gets home from preschool (my DD's nap time!) and when the older one gets home, and at bed time.
To be fair to them, until my daughter was born 2 years ago I used to play loud music in a passive aggressive way to drown out theirs, and now my daughter is a toddler, she too can make quite a bit of noise.
So, would I be unreasonable to report them again?
(They're slightly scary people, so I don't want to talk to them in person, have in the past about the music though, to no avail.)