Well tonight my sleep was stopped short around 2220hrs. I had fallen asleep watching sky news and awoke to a constant drone due to the kitchen door being open. I went to look in the sky and spot the low flying aircraft and to my surprised the drone was eminating from the opencast hillside. I was so stunned I asked the whole family to come and listen it just got louder. I admit that I or any of the family have heard the noise so loud. I phoned a complaint through and it was recieved by a polite guard in the security hut. I was assured it would be recorded. I think this leval of noise is unacceptable and the summer is just starting. Some hours must be cut to allow shift workers sleep not to mention young children.