1.) Firstly, super-insulate your house, then reduce what you waste - And even if you think you don't waste much - take a step back and take a real look.
Then.....
2. ) Install a Herald 8 Multi fuel stove with backboiler & get the house re-plumbed(powered with wood, rubbish and small amounts of coal/peat)
3.) Solar water heating tubes with double size water tank.
4.) Solar Voltaic Panels for Electric - Grid Tied power generation (Electricity will also start going up at massive rates, possibly by 200% over the next 4 years - this will be even more of a shock to all those houses that have 4 Plasmas going in the kids bedrooms, those 16 x 50W spots turned on every night underneath their gutterings and water heaters, cookers and 20+ transformers plugged in 24hours a day - even when not used for anything)
Could you deal with a £1000 Electric bill on top of everything else ???
All in all the above changes will cost around £12,000 now - but will reduce my bills by £1000 a year when complete. Then assuming the prices for Energy keep going up, it will be saving me £1200 the next year, then £1400 the following year. You get the picture.....
This is the way I'm going anyway. Currently at phase 2, and have already saved a packet.
You may forget about gas and Oil & electric as methods of keeping warm & don't try and stick your head in the sand and imagine the prices ever, ever coming down substantially...... it's going to get a lot LOT worse over the next 5 years.
Now is the time to re-think how we heat our homes & it's time everyone woke up to the cost of energy.