No - not those, nor improved heat recovery.But low energy lighting, draft exclusion, and insulation seem sound. No-one would describe these as 'nonsense', surely?
They only "work" when people are paid 4-5x what DNOs and electricity companies can make, distribute nationwide, and sell electricity at a profit for in order to incent them to do it. If that doesn't confirm the economic lunacy of PV I don't know what does. And where does the money for those payments come from? From the customers of the electricity companies. The government is forcing them to take money from the poor and give it to the middle classes to fund a hobby which has no environmental benefits whatsoever.Solar PV has the opposite problem - the economics works (now), but I am unconvinced by the environmental advantage.
It's shameful, and if the new administration can cancel contracts made by the old one for wasteful IT projects they can cancel FITs for PV panels.