"Something has gone really wrong" in the UK energy market and Parliament has to "tackle that", the shadow energy secretary told Daybreak.
Labour's Caroline Flint said a 46% drop in the wholesale price which was not passed onto customers when her party were in charge, but warned bills were getting worse under the coalition government.
"Prices are going up three times as fast under this Government than they were under us and we need to tackle that."
More top news
Rain and cloud will continue to spread eastwards across Wales and England, turning heavy in places.
A sexual predator who groomed murdered teenager Kayleigh Haywood on Facebook has been found guilty of holding her captive at his home.
Awarded the Victoria Cross for rescuing colleagues from the Somme, a Northern Irish soldier has been honoured with a statue in his town.