Powergen has today immediately responded to the reduction in standard prices announced by British Gas by reducing their tariffs within their suite of tariffs known as Price Guarantee. Under the Price Guarantee suite of tariffs - which includes EnergyGaurantee and ElectricityGaurantee, Powergen provide the comfort that customers are guaranteed a price which will be lower than British Gas standard quarterly billed account until 1st September 2008. The news of this immediate reaction can only serve as good news for customers who had elected to go onto one of these tariffs. The change in prices takes effect from today, 26th April 2007, for existing customers and from tomorrow for any new customers.