This is also the case for installation work on caravans, boats and fixed gas BBQs. If you feel that completed work is unsafe or unsatisfactory:
Mains power electrical work required when installing an LPG appliance must be done by a licensed electrical contractor.
Gas instantaneous (or continuous flow) water heaters must not be installed in bathrooms or rooms with limited ventilation, unless they are of a "room sealed" type.
Never install or use unflued LPG space heating and water heating appliances in bedrooms, bathrooms or sleeping annexes. They are also prohibited in caravans and marine craft.