Domestic energy users could still see the price of gas and electricity rise despite a fall in the cost of Brent oil.
According to npower's optimisation desk, Brent oil prices are expected to remain volatile, although they have fallen from a previous high of $127 (£76.84).
The energy supplier's Magali Hodgson commented: "The market has found a new level. But, with a lot of maintenance happening during June and a tight system, power may find some bullishness from gas prices.
She added: "The outlook for the next couple of weeks is a range-bound market with potential for more upside than downside."
Meanwhile, both British Gas parent company Centrica and Scottish and Southern Energy have warned their domestic and commercial electricity users that energy prices could rise by the end of the year.
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