I think only a psychopath would take ignoring a question as tacit agreement TBH. I was ignoring a seemingly facetious question that I assumed you knew the answer to (They would likely be stored at room temperature). To take me ignoring said question to mean that something has an infinite shelf life is a massive extrapolation and more than a little dangerous.

Thanks for your assurance about the number of cylinders we can store, now I'm totally sure that we have them or the ability to import them if we don't have them. The reassurances of an internet stranger who didn't know what temperature cylinders are stored at is more than enough to make me stop worrying about the safety of my children, and get fully behind this Brexit stupidity. Now that I fully believe, it should go through very quickly.