Since the end of food rationing after world war 2 we have not experienced rationing here in the UK, and yet some are advocating a return to those dark days in order to get to net zero emissions. See this article: Should everyone have their own personal carbon quota? | NOT A LOT OF PEOPLE KNOW THAT (wordpress.com)
I would expect such restrictions to result in mass protests and civil disobedience and any government bringing in such policies being voted out of office, but that would require a political party to come forward and oppose the policy - something that none of our major parties has, so far, done. We could be edging towards an Orwellian future if we are not careful.