<p>The following tables show average annual domestic gas and electricity bills over each of the last three years, split by public electricity supply (PES) region.</p><p><table><thead><tr><td valign="top" /><td valign="top">Averageannual gas bill by region(£)<br /></td><td valign="top">Yearon year change(%)<br /></td></tr><tr><td valign="top">PESregions<br /></td><td valign="top">2010<br /></td><td valign="top">2011<br /></td><td valign="top">2012<br /></td><td valign="top">2010-11<br /></td><td valign="top">2011-12<br /></td></tr></thead><tbody><tr><td valign="top">EastMidlands<br /></td><td valign="top">653<br /></td><td valign="top">709<br /></td><td valign="top">790<br /></td><td valign="top">9<br /></td><td valign="top">11<br /></td></tr><tr><td valign="top">Eastern<br /></td><td valign="top">652<br /></td><td valign="top">713<br /></td><td valign="top">797<br /></td><td valign="top">9<br /></td><td valign="top">12<br /></td></tr><tr><td valign="top">London<br /></td><td valign="top">670<br /></td><td valign="top">735<br /></td><td valign="top">819<br /></td><td valign="top">10<br /></td><td valign="top">11<br /></td></tr><tr><td valign="top">Merseysideand NorthWales<br /></td><td valign="top">661<br /></td><td valign="top">718<br /></td><td valign="top">795<br /></td><td valign="top">9<br /></td><td valign="top">11<br /></td></tr><tr><td valign="top">NorthEast<br /></td><td valign="top">656<br /></td><td valign="top">712<br /></td><td valign="top">787<br /></td><td valign="top">9<br /></td><td valign="top">11<br /></td></tr><tr><td valign="top">NorthWest<br /></td><td valign="top">661<br /></td><td valign="top">718<br /></td><td valign="top">795<br /></td><td valign="top">9<br /></td><td valign="top">11<br /></td></tr><tr><td valign="top">NorthernScotland<br /></td><td valign="top">649<br /></td><td valign="top">711<br /></td><td valign="top">791<br /></td><td valign="top">10<br /></td><td valign="top">11<br /></td></tr><tr><td valign="top">SouthEast<br /></td><td valign="top">661<br /></td><td valign="top">724<br /></td><td valign="top">808<br /></td><td valign="top">10<br /></td><td valign="top">12<br /></td></tr><tr><td valign="top">SouthWales<br /></td><td valign="top">659<br /></td><td valign="top">722<br /></td><td valign="top">807<br /></td><td valign="top">9<br /></td><td valign="top">12<br /></td></tr><tr><td valign="top">SouthWest<br /></td><td valign="top">658<br /></td><td valign="top">718<br /></td><td valign="top">805<br /></td><td valign="top">9<br /></td><td valign="top">12<br /></td></tr><tr><td valign="top">Southern<br /></td><td valign="top">657<br /></td><td valign="top">723<br /></td><td valign="top">807<br /></td><td valign="top">10<br /></td><td valign="top">12<br /></td></tr><tr><td valign="top">SouthernScotland<br /></td><td valign="top">649<br /></td><td valign="top">711<br /></td><td valign="top">791<br /></td><td valign="top">10<br /></td><td valign="top">11<br /></td></tr><tr><td valign="top">WestMidlands<br /></td><td valign="top">662<br /></td><td valign="top">725<br /></td><td valign="top">807<br /></td><td valign="top">10<br /></td><td valign="top">11<br /></td></tr><tr><td valign="top">Yorkshire<br /></td><td valign="top">655<br /></td><td valign="top">717<br /></td><td valign="top">791<br /></td><td valign="top">10<br /></td><td valign="top">10<br /></td></tr></tbody></table></p><p><table><thead><tr><td valign="top" /><td valign="top">Averageannual electricity bill by region(£)<br /></td><td valign="top">Yearon year change(%)<br /></td></tr><tr><td valign="top">PESregions<br /></td><td valign="top">2010<br /></td><td valign="top">2011<br /></td><td valign="top">2012<br /></td><td valign="top">2010-11<br /></td><td valign="top">2011-12<br /></td></tr></thead><tbody><tr><td valign="top">EastMidlands<br /></td><td valign="top">403<br /></td><td valign="top">447<br /></td><td valign="top">468<br /></td><td valign="top">11<br /></td><td valign="top">5<br /></td></tr><tr><td valign="top">Eastern<br /></td><td valign="top">407<br /></td><td valign="top">446<br /></td><td valign="top">467<br /></td><td valign="top">10<br /></td><td valign="top">5<br /></td></tr><tr><td valign="top">London<br /></td><td valign="top">425<br /></td><td valign="top">452<br /></td><td valign="top">475<br /></td><td valign="top">6<br /></td><td valign="top">5<br /></td></tr><tr><td valign="top">Merseysideand NorthWales<br /></td><td valign="top">431<br /></td><td valign="top">474<br /></td><td valign="top">503<br /></td><td valign="top">10<br /></td><td valign="top">6<br /></td></tr><tr><td valign="top">NorthEast<br /></td><td valign="top">407<br /></td><td valign="top">440<br /></td><td valign="top">469<br /></td><td valign="top">8<br /></td><td valign="top">7<br /></td></tr><tr><td valign="top">NorthWest<br /></td><td valign="top">398<br /></td><td valign="top">452<br /></td><td valign="top">478<br /></td><td valign="top">13<br /></td><td valign="top">6<br /></td></tr><tr><td valign="top">NorthernIreland<br /></td><td valign="top">486<br /></td><td valign="top">513<br /></td><td valign="top">546<br /></td><td valign="top">6<br /></td><td valign="top">7<br /></td></tr><tr><td valign="top">NorthernScotland<br /></td><td valign="top">439<br /></td><td valign="top">465<br /></td><td valign="top">499<br /></td><td valign="top">6<br /></td><td valign="top">7<br /></td></tr><tr><td valign="top">SouthEast<br /></td><td valign="top">408<br /></td><td valign="top">438<br /></td><td valign="top">464<br /></td><td valign="top">8<br /></td><td valign="top">6<br /></td></tr><tr><td valign="top">SouthWales<br /></td><td valign="top">443<br /></td><td valign="top">470<br /></td><td valign="top">503<br /></td><td valign="top">6<br /></td><td valign="top">7<br /></td></tr><tr><td valign="top">SouthWest<br /></td><td valign="top">430<br /></td><td valign="top">468<br /></td><td valign="top">496<br /></td><td valign="top">9<br /></td><td valign="top">6<br /></td></tr><tr><td valign="top">Southern<br /></td><td valign="top">424<br /></td><td valign="top">445<br /></td><td valign="top">470<br /></td><td valign="top">5<br /></td><td valign="top">6<br /></td></tr><tr><td valign="top">SouthernScotland<br /></td><td valign="top">433<br /></td><td valign="top">465<br /></td><td valign="top">483<br /></td><td valign="top">7<br /></td><td valign="top">4<br /></td></tr><tr><td valign="top">WestMidlands<br /></td><td valign="top">409<br /></td><td valign="top">449<br /></td><td valign="top">475<br /></td><td valign="top">10<br /></td><td valign="top">6<br /></td></tr><tr><td valign="top">Yorkshire<br /></td><td valign="top">398<br /></td><td valign="top">437<br /></td><td valign="top">468<br /></td><td valign="top">10<br /></td><td valign="top">7<br /></td></tr></tbody></table></p><p>Wales is covered by the Merseyside and North Wales, and South Wales PES regions (a small number of Welsh postcode districts also fall into the East Midlands PES region).</p><p>These bills assume an annual gas consumption of 18,000kWh and an annual electricity consumption of 3,300kWh. Energy bill estimates are made on a calendar year basis. Bills presented are a weighted average of credit, direct debit and PPM payment methods, and home and non-home suppliers. DECC does not hold data on gas bills in Northern Ireland. These data are taken from Quarterly Energy Prices, tables 2.2.3 and 2.3.3:</p><p>https://www.gov.uk/government/statistical-data-sets/annual-domestic-energy-price-statistics</p><p>Energy prices vary regionally. Network costs, which account for 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 networks which deliver energy directly to the 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><p>Ofgem, the independent regulator, sets price controls which limit the total amount of revenue that distribution and transmission companies can earn.</p>