Energy is an unusual commodity as it imposes running costs and capital expenditure. The main way to permanently reduce running costs is to spend money on more efficient use of energy: better insulated homes, more modern boilers, new appliances.
Author: European Council for an Energy Efficient Economy (Source: http://www.eceee.org/all-news/news/news-2024/who-is-in-fuel-poverty-the-government-has-no-idea-as-it-moves-to-cut-winter-fuel-payments/)