Not quite true - if I (as a registered gas safe engineer) come across a dangerous installation or appliance I’m as any other qualified engineer is required by the gas safety installation and use act to notify the hse via my line manager or directly if self employed by completing a form ( riddor) failure to do this can lead to myself being reported. It is probable that these riddor forms end up on some blokes desk collecting dust until unfortunately a death or explosion. The reference to buying electrical safety components, breaks for cars is a fair point , but the same within the gas industry is also true - b/q s/fix t/station will sell anyone gas parts and fittings but the specialist parts centres will ask for your gas safe number -absolute madness but the onus is on the customer to employ “ qualified “ tradesmen and to check their credentials. In the 30 or so years I’ve been a gas engineer I can only recall one engineer being struck off for dangerous work but he was a repeat offender and he stuck his head above the parapet too many times . Btw -in the event of a court case - registered gas engineers who break the regulations will face the full weight of the law as they are deemed competent but the average joe will get a slap on the wrist or fine as they will be deemed incompetent .