Point taken, Dr D, but it still doesn't account for idiots who haven't got proper testing equipment, and if they had, don't know how to use them. You do have to have some idea of fundamentals, i.e. how a boiler works, internal controls, etc. You could argue that, if a numpty wants to work on his gas boiler, and he ends up poisoning himself and his family, then it's one less fool in the gene pool. But it could be you moving into said numpty's house after he has 'tinkered' with his boiler, he survives, hands you the keys and you end up being poisoned. Now don't get me wrong. I think that CORGI are a bunch of rip off merchants with a stranglehold on the gas safety industry, and with NAPIT pulling out of the tender, it only makes them stronger. But, in my opinion, we do need some form of control on the competency of DIY-ers.
This debate will go on and on
This debate will go on and on