Plasterboard ! dont use it! a dangerous suggestion here so heres a safe one , if you dont know what you are on about keep your dangerous suggestions to yourself.
Good post , I looked into this and sure enough anyone can install a stove , BUT to be legal it needs to be signed off by either HETAS or your local building control , I spoken to Plymouth council building control and they informed me the fee would be £252 if notified in advance or £370...