I have signed up to support the Compass statement on levying a windfall tax on energy and oil companies. Have a read of the statement to see whether you can support it too.
There are practical issues that are still being looked at: how do you ensure that the windfall doesn't feed straight into further price increases? What impact will such a windfall tax have on investment (most particularly in grid upgrades and renewable energy)?
However, the idea of creaming off excess and supernormal profits and using them to help families afford increases in fuel bills as well as improving the environmental efficiency of their homes is one that I support in principle.