Having just had some quotes done to insulate my not particularly big house I'm starting to think these protesters have a point that it needs government funding. Older house without cavity walls, apparently a common issue in this part of Cov, looking at £7K+ to insulate a 2 bed terrace
That's before you consider the cost of replacing the old double glazed windows and doors with something more energy effieicnet. That will make it over £10K to make the house more energy efficient. How many people have that sort of money lying around? If they do not sure insulation is top of their list of things to spend it on.