Energy customers are likely to see significant bill increases every three months rather than half-yearly as Ofgem warns they face a "very challenging winter ahead". The regulator said the change will provide some stability for the market following Russia's actions in Ukraine leading to ongoing volatility, adding it is "not in anyone's interests for more suppliers to fail and exit the market".
Here, the PA news agency looks at what the price cap is, why prices are set to rise further for customers, and what, if anything, they can do to cope with soaring increases.
What is the energy price cap?
