[skysurfer]

An obvious source of alternative fuel is wood.
So much good potential fuel goes to landfill from overflowing skips.
Most people with a skip in their driveways are pleased to have you raid it for old timber because they have more room for new junk.
A chainsaw or even a bow saw and an axe or two and a corner to store your free fuel and at least - if you've a fireplace - you'll stay warm for a while.
Dave