One in three households with at least one person in a full-time job - four million in total - say it is difficult to afford their energy payments. Half of them (49%) will cut their energy use over the winter to keep payments low, and one in three will not be switching on the heating even as temperatures plummet, despite two-thirds worrying about the effects on their family’s health. The situation is set to worsen as major suppliers prepare to raise their prices, warns comparison website uSwitch.