Thanks Simon for that. I havent mentioned it before on this thread but they have in the past burnt a pile of " treated " doors and the white "toxic" fumes created a "a white out ". Thankfully I had just gone nextdoor and stayed in the neignbours' property for about an hour until it cleared .To this day I 'm thankfull I wasnt at the bottom of the garden as I believe that I would have suffered serious lung damage even if I 'd made it alive back to the house. I know this all sounds rather dramatic but the smoke was a thick as you see on incidents that make on to national news and most of the time we are always down wind .