My next door neighbour is the same, only he doesn’t work particularly odd hours, he just doesn’t appear to sleep. In the summer when the weather is nice they sit out in the garden talking loudly and drunkenly until the early hours any day of the week, then at the weekend he puts his (numerous) empty beer bottles in the blue wheely bin at 6.45am.
We’ve had words before, when his family and visitors used my grass as a parking space but it makes no difference, they’re a nice couple, but some people have absolutely no regard for other people so should be culled.