Stats
Your dubiously useful stats at the end there are all well and good, but they are not very relevant. I realise they are to make a point, but the problem with patio heaters isn't that they are particularly energy inefficient (as the article points out, whether something is efficient depends on what it's purpose is), nor that they are particularly big carbon generators in the grand scale of things. It's that they are just so wasteful and pointless.
Sure, they are probably okay at heating patios, and that is their purpose, but the question we need to ask is should we be heating patios in the first place? I can't believe I am approving of a nanny state banning of an activity like this, but really, people are just bloody idiots for doing it. So they only account for ~0.1% of the UK's carbon output? So what, that's only because there are a limited number of idiots in the UK.
Cars get people from A to B, patio heaters blow hot air into space, so cars are worth the carbon output.
And besides, cars go faster than patio heaters


