We can put people in a rocket and take them to the moon but we can't replace windows and make them look identical to the previous ones but with all of the modern efficiency. Because oh well, the building won't be looking exactly like two centuries ago or something.
Completely crazy, let me tell you... :(
And apparently the Green Deal was a failure - https://www.theguardian.com/environment/2016/apr/14/green-de....
There are about 2000 - 3000 grade 1 and grade 2* listed buildings in London. 92% of all listed buildings are grade 2; the other 8% are grade 1 or 2. So there's likely to be a fair amount of properties that are listed.
http://londonist.com/2011/06/all-listed-buildings-in-london-...
You even had to use authentic rubbish paint on the doors
Instead, I'm sure half the energy footprint goes to waste through those windows...
Plus, read my comments. I'm saying the government should take care and sponsor the fixes to ensure the quality while greatly reducing the energy bill (that's my thesis).