The energy markets regulator Ofgem today announced that 4 million customers have switched suppliers in 2006, with 100,000 more switching in January and February this year than in the same period in 2006.

In the same press release, Ofgem also stated that 'a big price gap has opened up leaving EDF Energy and ScottishPower customers paying over £100 for remaining loyal'.

EDF Energy and ScottishPower have not yet announced any plans for reducing prices for their existing customers.

Ofgem encourages all consumers to 'shop around to get the best deal' and that 'even if a supplier has announced price cuts customers may still be able to get a better deal by switching to a competing supplier'.