Don't Safefill cylinders need to be replaced after 15 years - not sure how that's enforced.Here’s the link
Theres advise to have them inspected at set periods but Safefill have no process to do it. And then you draw a blank on who is competent to do it against what criteria. The Flogas Gaslight bottles are similar construction but are exchanged for a full one and the empty is returned to Flogas. Morrison’s are a key locator for fillling but not all Morrison’s will allow refilling. Our local Morrison’s sell auto gas but don’t allow filling lpg cylinders.