EDF increases energy prices by 11pc The price hike from EDF follows increases several other energy suppliers in the past week. Ann Robinson, at uSwitch.com, said: "This is the final hammer blow for energy bills this side of Christmas. Consumers now face a winter of rationing their energy usage - many will be forced to turned their heating down or off for fear of the impact of these hikes. Some households are already performing a juggling act to balance budgets and keep their heads above water. And the added pressure of the latest round of energy rises may be the straw that breaks the camel's back. However, we welcome EDF Energy's support for its most vulnerable elderly customers who will automatically benefit from its cheapest prices. This could be a lifeline for many. Eon is last of the "Big Six" energy providers remaining not to have announced a price increase. Earlier this year, the utilities company promised not to raise the cost of standard residential prices in 2012.