I doubt we will face a winter crisis, at least not compared to the miners' strike that brought down the Heath government in '73, with a 3-day week, no TV after 10:30 pm - which was at a time when we were nearly fully dependant on coal. Now, 50 years later, the wind will keep blowing, and the turbines will turn.
The unions can be very stroppy when it comes to jobs. If they can't see the winds of change (pun intended), then more fool them. Anyway, Labour isn't as reliant on the unions as they once were, a legacy of Blair and New Labour.
I can see quoted posts of course, but quoting your post doesn't include the post you quoted! However, as far as emitters like India and China are concerned, I wouldn't say "free pass"; when it came to trying to get agreement, the West had three choices:
1. Get everyone to agree to a minimum level of reduction (which would not happen)
2. Abandon the whole business through lack of agreement by certain countries
3. Reluctantly accept a certain level of compromise as being 'better than nothing', which is what we had to settle for in the end.
We don't know what China is up to, they are an industrialised authoritarian Communist economy who keep their cards close to their chest. Maybe they will come to see the danger posed by climate change. Let's hope so. What's more important is that America under a Democrat president and Congress are making great progress and reduction of CO2 - that really does make a difference. As far as Britain is concerned, we do still have some influence in the world. If - I should say 'when' - we achieve carbon neutrality there are nations that will take notice even if our contribution amounts to the proverbial teaspoon (actually it is more that that, though not a huge difference on its own).