JOHN PERRY was Director of Policy at the Chartered Institute of Housing for twelve years until early 2003. He took the lead on a range of issues including housing investment, housing strategies and welfare reform. Since March 2003 he has been based in Nicaragua, where he helps co-ordinate projects with low income farming families, including the installation of solar panels in homes without electricity (see www.cih.org/nicaragua for further details). He is now part-time Policy Adviser to the Institute, and his recent UK work has been on housing finance and the future of ALMOs, community cohesion, refugees and migration, and housing and climate change. He has written, edited or contributed to numerous books and reports, the most recent of which is a practice brief Greening your Housing Stock (March, 2012).