If you heat your home with oil, you already know the routine. You watch the price per litre, you time your order, and you hope you're filling the tank when the market's kind, rather than when it's spiking.
Around 1.7 million homes in England and Wales still run on oil or LPG (liquefied petroleum gas). Most of them are in rural locations that are not connected to the gas grid, and every one of them makes the same pricing gamble a few times a year when it comes to refilling the tank.
