British Gas as responded to comments about wholesale energy saying that "when our costs fall, our prices do too".
The wholesale cost of energy is now less than half the bill which partly explains why the wholesale price can fall, but overall prices don’t.
Most suppliers buy their energy in advance, up to three years in some cases, to ensure security of supply and smooth out price volatility.
When our costs fall, our prices do too.
In December, the government’s restructure of the energy efficiency scheme ECO, resulted in British Gas being the first supplier to introduce a £42 price cut for all our customers, including those on fixed deals - the only supplier to do so.
More top news
A 17-year-old boy has been charged with the murder of two men in Ipswich.
The X Factor judge praised the One Direction star for his bravery - after performing on the show just days after his mother's death.
At least 13 people have been killed by a car bomb after two explosions went off close to a football stadium in Istanbul.