Household energy bills are expected to increase by 13% from July, affecting customers using both electricity and gas. According to reporting in The Independent, the change would mean an average household paying about £18 more per month for energy. The Belfast Telegraph also reports the same 13% jump starting in July, indicating consistent coverage of the timing and overall size of the increase. The sources focus on the impact for typical households rather than specific tariff changes for individual suppliers, and they describe the figure as an average for customers on combined electricity and gas usage. Overall, the information points to a mid-year uplift in household energy costs, with the monthly effect estimated at around £18 for the average consumer. Further details about which rates or tariffs are affected, and whether the increase varies by provider or region, are not included in the excerpts provided.