Started to hear scratching...

This is really bothering me, the amount of rubbish in the local area has increased, alongside the visible drug selling and taking.
Because of this I'm hearing scratching in the early hours of the night.
It's now 3.32am and they're at it again on the flat roof above me.
I think they've broken a barrier because my living room light fitting has stopped working properly.
And it coincides with the first sound of scratching last week Tuesday...
Grrr... This bull again!