A survey of 1000 families claims that 25% of households have had to decide between spending money on heating the home or feeding their children.
The survey, which is being carried out by the Energy Bill Revolution campaign group, said that families were faced with the difficult choice this winter.
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The Labour leader criticised the government for handing out contracts to the now-defunct construction firm after a third profit warning.
A man who strangled a girl during a violent sexual attack and then hid her body in a wardrobe has been found guilty of murder.