*Collective will run until the cap is reached or will close at 23.59 on January 9th 2018. The count of switches is from across energyhelpline and their partner collective switches. £262 a year is the average customer switch saving. The collective winning tariff from SSE is the cheapest big supplier deal costing on average £889 a year. The next cheapest from E.ON costs £929 a year. All figures correct as of 6 Dec 2017.