You can help heat your hot water during the summer from the sun and in the winter from wood, from local woodlands.
There are plenty of guides on the web for wood burning stove and boilers:
Carbon Trust - biomass boiler guide
For wood fuel suppliers
Renewable Energy Association (REA) has a list of members as does the Solar Trade Association (STA) and stove industry alliance.
- http://www.r-e-a.net/membership/directory
- http://www.solar-trade.org.uk/members/
- http://stoveindustryalliance.com/