Energy customers will be automatically offered cheaper deals by the suppliers, Nick Clegg will announce today (Wednesday, April 11, 2012). Under the scheme, every household will be notified at least once a year if they should switch tariffs. In his speech, the Deputy Prime Minister will say: "We can help people get their bills down. We have secured a landmark deal with the six big energy companies to give customers a guaranteed offer of the best tariff for them."