<p>Monthly price indices for both electricity and gas are published by the Office for National Statistics. The latest data can be found under 'Consumer Price Inflation, October 2013,' available from the following web link:</p><p>http://www.ons.gov.uk/ons/rel/cpi/consumer-price-indices/october-2013/index.html</p><p>Data on average gas and electricity bills are published by DECC on an annual basis. The average annual domestic gas and electricity bills and associated prices in each of the last three years are shown as follows.</p><p><table><thead><tr><td valign="top" /><td valign="top">Gas<br /></td><td valign="top">Electricity<br /></td></tr><tr><td valign="top" /><td valign="top">Averageannual bill(£)<br /></td><td valign="top">Price(p/kWh)<br /></td><td valign="top">Averageannual bill(£)<br /></td><td valign="top">Price(p/kWh)<br /></td></tr></thead><tbody><tr><td valign="top">2010<br /></td><td valign="top">658<br /></td><td valign="top">3.7<br /></td><td valign="top">418<br /></td><td valign="top">12.7<br /></td></tr><tr><td valign="top">2011<br /></td><td valign="top">719<br /></td><td valign="top">4.0<br /></td><td valign="top">453<br /></td><td valign="top">13.7<br /></td></tr><tr><td valign="top">2012<br /></td><td valign="top">800<br /></td><td valign="top">4.4<br /></td><td valign="top">479<br /></td><td valign="top">14.5<br /></td></tr></tbody></table></p><p>Data in this table are taken from Tables 2.2.1 and 2.3.1 of DECC's publication Quarterly Energy Prices (QEP), assuming an annual consumption of 3,300 kWh for electricity and 18,000 kWh for gas. The annual price data shown are derived from these bill estimates. Provisional annual bill estimates for 2013 will be published in December's edition of QEP on 19 December 2013.</p>