<p>The DECC publication Quarterly Energy Prices contains tables showing the. average unit costs and energy bills by region. The tables are available at the following link (see table 2.2.3 for electricity and table 2.3.3 for gas):</p><p>https://www.gov.uk/government/statistical-data-sets/annual-domestic-energy-price-statistics</p><p>These tables assume an annual consumption of 18,000 kWh for gas and 3,300 kWh for electricity. The latest data is for 2012 and provisional estimates for 2013 will be published on 19 December 2013.</p><p>Network costs, which account for around 20% of a dual fuel bill, include the cost of building, maintaining and operating the local gas pipes and electricity wires and the high pressure gas and high voltage transmission</p><p>networks which deliver energy directly to your home. Suppliers are charged for this service and pass on the costs to the consumer. The cost of this varies according to region, therefore the costs to the consumer will depend upon the area in which they live.</p>