Summer might be on its way but consumers could be encouraged to switch gas and electricity plans ahead of potential price hikes.
Five of the Big Six energy suppliers have announced plans to pull certain domestic energy tariffs on or before July 1st, including npower's Price Guarantee 2011 which runs out at the end of May.
If customers do not seize the opportunity to compare energy deals from other suppliers, they could be paying hundreds of pounds a year unnecessarily.
For example, householders on Scottish Power's Online Energy Saver 5, which ends on June 1st, currently pay £932 a year on average.
This could rise to around £1,211.35 if the supplier transfers them onto its default tariff, whereas they could be saving £256 if they switch.
Customers are also advised to choose a fixed rate deal to lock in cheap prices while they can.