Sheep’s-wool wall insulation, underfloor geothermal heating, rainwater harvesting and aerodynamic roofing: these are a few of the ways in which luxury developers are seeking to make homes more eco-friendly without sacrificing style.

Whether their wealthy clients want such sustainable dwellings is another matter. A recent survey by UK estate agency Knight Frank and Citi Private Bank found 55% of wealth advisers thought climate change had had a very limited effect on the behaviour of high-net worth individuals.