I can recommend: Chimney Sweep
My thanks to Floren, the guy who came to clean the chimney of my wood burner. Due to the interior to exterior flue being a 90 deg bend, he couldn’t do it without uncoupling the burner itself. Whilst it was out, he stripped, cleaned and resealed all the pipe work.
Works better now than for years. And no back smell either. His number is 666205423. Highly reco