To be honest, if it weren't so abysmally complicated, Italy's approach would be better. Here you can (theoretically) connect to biomass district heating and get 110% of the cost back (in practice you sell the stake to a bank which takes 10% so you just get a free install) or you can externally insulate/upgrade a boiler etc and get the same deal.
The problem is Italy is notorious for making the procedure so complex that you risk not meeting the criteria on a technicality, or the government pulling the subsidy when you've already spent the money. So the only people ordering such work are large firms that manage blocks of flats or whatever (effectively finance firms) that have the technical and legal knowledge to get it right, and a finger in the pie. Meanwhile the price of this kind of work has gone through the roof and the government pays... with my money.
As for the UK, Greta hit the nail on the head with her 'net zero bla bla bla'. Very easy to try the technofixes, but what might actually be more effective is if we stopped living in houses that have more than 500sq ft floor area per occupant. Of course, the problem with us having this level of discussion is that we'll never truly understand the 95% of people who aren't technical at all and rely on receiving disinterested and impartial information from product suppliers - and that, or course, applies equally to our politicians. The problem is that what we desperately need is systemic behavioural change - no more holidays abroad, massively reduced transport (actually travel less, live closer to work etc), make our 'stuff' last, and a reduction in consumerism, reduced consumption of meat (especially beef) and meat products. I do wonder if even a majority of Fridays for Future really understand that the reason 'They' are cutting down the rainforest and extracting fossil fuels is that We provide a market for it. Only then can we start lecturing other countries, but that is, of course, also essential (even if a lot of China's emissions is a result of 'stuff' we buy from them). Unfortunately, politicians of nearly all colours refuse to accept we might have to make do with less if we want to survive as a species and while the Green Party may get it, it then starts discussing things like homeopathy and possibly loses a lot of votes in the process.
Having said all that, what I've seen of humanity over the Covid period is making me feel I hope we go extinct as a species as quickly as possible and without taking too many other species with us. We're nothing special. [EDIT - bit harsh?]