https://www.ofgem.gov.uk/blog/wholesale-energy-costs-and-your-bills
"Currently in Great Britain, wholesale gas prices can set the price of wholesale electricity a large majority of the time because there are not enough renewables built to avoid some use of gas. As we continue to generate more renewable electricity and develop ways to store it, for example using battery storage, gas could set our electricity prices much less frequently. Based on the National Energy System Operator (NESO)'s modelling, we estimate that gas could set this price just 30% of the time by 2030. This will mean wholesale gas prices will have a much lower impact on electricity bills."