This has been happening for about three weeks now, every night around 2-3am. I live on the edge of the Yorkshire Moors (near Hebden Bridge) and I keep hearing what sounds like singing or chanting coming from the direction of the moor. It's not quite human-sounding but definitely organized, rhythmic, almost musical.
Last night (18th) I went out with my torch to see if I could locate the source. It seemed to come from about 200 metres away, towards the ridge. The sound stopped as soon as I went outside. This has happened every time I've tried to investigate.
My partner thinks I'm hearing things. My neighbour suggested it might be foxes but I've heard foxes and this is completely different. Not wind (too structured), not animals (wrong pattern). I'm wondering if anyone else in the area has heard this or if there's a rational explanation I'm missing.