At current exchange rates , the $ 25.8 million increase was offset by a $ 20.5 million translation effect into USD , including $ 15.0 million due to USD-GBP movements . $ 2.7 million increase from the non-regulated business. by a decrease in consumption observed toward the end of calendar 2008. effect from April 1 , 2008 and September 1 , 2008 .