And, of course, the more onerous (and expensive) you make the regulations and mandatory checks, the more likely people will become to simply try and get away without having them.
People who are currently prepared to accept the (I think!) relatively low costs of a BSS inspection every 4 years, might take a different view if it, or something equally expensive, was forced on them every year.
For those of us who own our own houses, even if who can do various installation work is now highly regulated, there is absolutely no requirement for safety checks of any kind, or at any interval - that should put it into some kind of perspective, as houses don't blow up all the time. Clearly you have to be a bit more careful with gas on boats, as they carry their own supply, may take the odd bump, and tend to fill up with the stuff if a leak develops.
But I continue to say the measures we have to go through compulsorily should be constrained by the actual history of risk, not because of some hysteria that properly carried out LPG installations on boats still represent a very high risk level, but with no data to prove the point.
Yes, of course someone can find a story about a boat with gas leak, fire, or even an explosion - possibly even occasionally one where someone has died. I can always match that with a story about someone else who has died in a boat, or on the canals generally, but not because of an LPG fault. Just because someone manages to go off the back end of a boat and end up killed in the prop, I would never insist that everybody had to have a 5 foot high fence around the back end - it just wouldn't make sense.
If individuals want to spend extra money on additional checks for their own peace of mind, it is entirely their prerogative to do so. Without proper statistical data to back up their claims of danger, they should not try and force such things on others.