U.K. energy regulator Ofgem said Monday that 5.1 million customers switched gas and electricity suppliers in 2007, the highest level of switching in five years. Customers are switching in order to save money after all of the U.K.’s six major energy suppliers raised their energy bills this year, Ofgem said. Ofgem said customers who have yet to switch could still save on average GBP92 a year if they pay by standard credit, or rather by check or credit card. Customers could save even more if they also switched to cheaper payment methods, such as direct debit, Ofgem said.

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