The Green Deal is a Government initiative designed to help people make their homes more energy efficient, but with No up-front cost to the occupier. The repayments for the work you have installed are taken through the savings you will make on your energy bills over a period of time, generally the length of the shortest measure.
Energy saving measures include:
Insulation: solid wall, cavity wall and loft
Heating upgrades: replacement boilers
Draught-proofing.
Renewable technologies: solar panels and wind turbines.
Visit the Surrey Energy Ratings Ltd website for more information on Green Deal Surrey