Solution to disaster zone housing crisis. Can be constructed by two people in under 3 hrs. Does not require water, electricity or heating / cooling. Collects rain water via roof and is stored in the walls. Lighting is provided via solar powered lamps with minimum 5 hrs illumination time. It is water tight and ballast is stored in cavity walls for thermal mass and weight / stability. On-site ballast can be sand, water, earth or whatever materials are available. Made of recycled plastic and is 100% recyclable. Size is 5m squared. For more details please contact: charlie.greig@btinternet.com