Rocio Concha, Which? Director of Policy and Advocacy, said: "Households up and down the country will be struggling with the rising cost of living and higher energy bills this winter - with those on the lowest incomes hit hardest. "It's hugely concerning to see Ofgem has found that so many energy firms are falling short on the support they provide to their most vulnerable customers. "Energy firms must urgently up their game and do everything they can to support their customers through this crisis, especially those most in need." -ENDS- Notes to editors - Which? has launched a new campaign, calling on businesses in three key sectors - supermarkets, telecoms and energy - to do more to help consumers through the cost of living crisis. See more: .