I expected a cage around my bottles.

A gas installation doesn’t require a cage. It just requires that the bottles are protected from falling over (so kept sober). Gas cages are fugly! The regulations insist that they are over 80% ventilated which means you end up with a fishing net, there is no way to make ’em pretty. If you really want one ‘cos your kid is a tyrant (gas cage may not be the problem here) or ‘cos your neighbours keep stealing your bottles, no worries, we can add it to your contract and hook you up. Your home, your warts.

Just tell us about it beforehand.