The Government has said it is "doing everything within its power" to help keep energy bills down for families struggling with mounting debt.
A spokeswoman for the Department of Energy and Climate Change said:
The Government is doing everything within its power to help hard-pressed families keep their energy bills down.
In December we announced plans that will save customers around £50 on their energy bills, protecting support through the ECO scheme for vulnerable households, extending the scheme for an extra two years, and making an additional £450 million to make Britain's homes more energy-efficient.
More top news
Wintry scenes across the UK this late in April have not been seen since the mid-1980s.
The Labour leader will also announce an inquiry into anti-semitism and other forms of racism to be chaired by Shami Chakrabarti.
A switch in the wind direction will mean the unseasonably bitterly cold air of the last few days finally gives way.