I remember there was a pressure group "insulate britain". Their aggressive tactics got them banned and arrested, and the idea was never heard from again. I sometimes wonder if that wasn't the intended outcome, a low-temperature conspiracy theory.
You mean in the sense of deliberately discrediting "invest in insulation to reduce fossil-fuel consumption", with a small group designed to fail?
I'd forgotten about them, given the timing.
Thinking about who might benefit from it being a conspiracy, the only finger I can point at would be Russia? (Well, unless it's a long-term generational anger at the British Empire, which I have discovered is more of a thing than most Brits realise).