EA were all over me like a rash when someone reported a bonfire I was having on a little development. Only burning wood so it wasn’t really causing a problem. It was basically nimbys trying every trick in the book to disrupt the development!
Well everything has to be investigated, especially so if there is a lot of complaints. Always easy to spot the nimbys, but as long as what you are doing is legal then there’s no problem.
Smoke can be considered a statutory nuisance though, dealt with by the council – Env Health – so even if you are burning waste and its ok with us the council may still have a problem with it if its annoying local residents. No idea how they enforce this though.