Forums and comments board are full of people saying DIY gas at home is OK that it is not against the law. I really think they are ignorant, wrong and dangerous people.
No, they're right. The law is based on the Health and Safety at Work Acts and have no bearing on what people do in the privacy of their own home. The HSE haven't introduced legislation banning DIY gas fitting, because there is no history of serious problems with it.
You may prefer that the law says something different, but you (TaraPlumbing) have a vested interest. The law says what it says, so please stop telling people that it says what you'd like it to say.
Similarly, the legionella legislation is based on the Health and Safety at Work Acts and does not apply to domestic premises. I've been told by many deluded people, including industry 'professionals' that you can't get legionella from domestic water systems and that there's no history of anyone becoming ill from a domestic water system. Utter tosh, it's just not notifiable and it's not recorded.