It has been shown that in many occasions the main benefit of living and working in healthy and energy efficient buildings is not just the energy saved but the impact on productivity it generates.

That sounds like a sound investment to me, and I am sure that to many others who may not appreciate those benefits otherwise.

This Autumn statement doesn't provide all the solutions by any means but it could provide a start if mechanisms are put (back) in place to build not just quantity (insufficient targets as yet) but quality (which doesn't mean expensive) efficient new houses and refurbished buildings.