National Trust, saving energy in historic buildings, Ashden Gold Award Winner 2012

The National Trust has cut energy use in its Wales region by a massive 41% over just two years, demonstrating that even the most sensitive buildings can be made much more energy efficient. Secrets of success include a combination of efficiency measures, sustainable heating technologies and culture change. As well as cutting down on energy use it has also installed renewable sources of energy, including solar PV and hydro power.