Big improvement on the existing house. It looks like the hidden gutters might introduce cold bridging though and I would worry about summer overheating, as indicated by the existing window sun shades.
Speaking as one of the zealots Paul Finch is so embarrassed by, I have to agree with the first comment, he is certainly missing the point. I think he agrees that human activity has brought us to this crisis point and continues to deepen the crisis with every day that we continue with the same way of life. What he seems to be saying is that we should carry on with the same activities that have brought us here and simply find ways to mitigate the affects of our disastrous inability to change. Isn't this not like saying, if we've got a headache from bashing ourselves over the head we just need to find increasingly strong painkillers while continuing to bash ourselves over the head!
I understand that people like Paul Finch desperately want to cling to the life styles that have brought us to the brink but if we can open our minds to new possibilities we may find that a low carbon, more sustainable world may actually also be a more pleasant place to live.