and domestic heating oil – meaning kerosene, specifically BS 2869 Class C2 kerosene. Heating oil is used for home heating in England, Scotland and Wales, typically in premises away from mains gas. There are around 1.5 million people in Great Britain using oil for home heating. Great Britain has many suppliers of heating oil ranging from large companies such as Conquest Oil Company and Crown Oil to local and independent heating oil suppliers such as J. R. Rix & Sons. Many villages may use buying groups to order heating oil at the same time, thereby accessing lower costs. Many heating oil suppliers will choose to list their prices on independent heating oil price comparison websites. These sites draw in home heating oil users and compare various local supplier prices in order to provide the lowest price available. In the UK it is possible to search for prices by town name, county and postcode prefix. The Department of Energy and Climate Change (DECC) have referred the UK oil market to the Office of Fair Trading (OFT) for review. The OFT has resolved to look at the structure of the market, with a view of the fairness for consumers and alternative energy options for off-grid consumers such as heat pumps. Heating oil storage regulations in the United Kingdom Heating oil storage in the United Kingdom is governed by regulations that ensure the safe installation and usage of oil storage tanks. It is a criminal offence to keep a tank that violates these regulations, and the owners are liable for fines, penalties and any costs incurred as a result of cleaning up oil spills. The regulations are designed to minimise the risk of damaging pollution and reduce the likelihood of oil being stored in hazardous environments, such as a building without proper fire safety measures. The regulations that govern oil storage tanks are The Control of Pollution (Oil Storage) England Regulations (2001), The Pollution Prevention Guidelines (PPG 2) and The Building Regulations (Approved Document J). The Oil Storage Regulations (2001) apply to oil tanks used for commercial and industrial purposes, or domestic tanks over 3500 litres in capacity. They state that the storage tank should be of "sufficient strength and structural integrity to ensure that it is unlikely to burst or leak in its ordinary use". The tank, along with any filters, gauges, valves or ancillary equipment, must be contained within a secondary