I had this a while back I was clearing an elderly neighbours garden for her, and burnt all the lush green weeds lol, some old bint from down the road came up complaining saying exactly that, I put the fire out then went and googled it

IIRC it was summat like, ideally after Dusk, BUT no law on when you can cant, BUT IF you have a fire everyday, t cant be classed as a nusiance, but the neighbour would have to keep a diary detailing all the times and dates of the fires before the council could do anything

The police can intervene, but ONLY if the smoke from the fire is blowing across a main carriageway