Thank you for those links Iains. You're correct, Creosote is banned here, and Creocote is the permitted substitute. But the locals gather up old, rotten fencing panels which have been creosoted and burn them. Also, they look for fallen trees which are half-rotten, saw them up and use them too. They have no other form of heating, they just heat the sitting room with their wood burners.

We're very fond of these two couples, they're real old Norfolk folk, with lovely accents to match. I did once ring the Environmental Officer for Breckland without giving out names, but he just wasn't interested. So we merely shut our windows if the smoke starts up during the night. (They keep their fires burning overnight and add wood at about 2am!!)
I love open windows while I sleep; ah well...