Big 6 standard energy tariffs
An estimated 18 million (64%) households are on expensive standard tariffs with "Big 6" suppliers. Prices of these tariffs have dropped by just 6% in the last 2 years, whereas the cheapest deals on the market overall have dropped by 22%. The gap between the typical dual fuel big 6 standard tariff and the most competitive deal on the market grew to around £329 in May 2016. In percentage terms this gap has doubled since May 2014 (16% to 31%).