Wholesale energy prices increased significantly from December 2007 as oil prices climbed steadily all year long eventually peaking at $147 barrel in July 2008 (Some 'experts' were predicting that oil would hit $200 dollars a barrel towards the end of the season). The impact of the "credit crunch" drove oil prices down to below $60/barrel towards the end of the year, less than half of their peak in July, and Gas and Electricity prices soon followed.
British Gas raised gas prices by 35% and electricity prices by 9% in 2008 just 6 months after a 16% increase - the only decrease we have seen so far since is a 10% reduction, although suppliers argue that in 2008 when prices started to rise they did not pass on the increases straight away.
Suppliers argue that they have 'brought' energy before hand at higher prices. The many 'big 6' suppliers are vertically integrated and a large number of them plenty of power generation to cover up their supply businesses so they really don't should buy from this marketplace regularly (although retail will argue they certainly).
While suppliers cannot adjust their prices each day for household / domestic supplies like they will and do for any commercial sector a result of the numbers involved, they also have had a great deal of opportunities in the last year to finish on a lot of falls.
Is there a betting that suppliers cut their prices by the token percentage after winter 09/10 when they have maximised their profits. Know more about Erdgas Tarifvergleich kostenlos hier