just had building control around this morning to sign off my self fitted log burner and twin wall flue, I was a bit concerned about the drilling through the wall for the flue but once started it was pretty straight forward and took my time fitting the flue and wall mounting brackets but found everything fairly straight forward and any questions or queries were promptly answered by Julian, just been outside and checked the top of the flue as are due to have 50-60 mph winds today and everything looks greats overall very satisfied with Stovefitters oh and the fire is brilliant it sure kicks out some heat!