24 Hours to Improving Essex boiler installations
http://slob.org.uk/Wondering-How-To-Make-Your-Electric-Heating-System-More-Efficient--1609055181.html
Glow Worm offer several combi boiler ranges, including Ultimate, Betacom, Easicom, Essential and Energy. Some existing oil burning boilers can be converted to consume such fuels. Luckily, there are a lot of options