Fuel Mix Data for Electricity Suppliers in the UK

Do you want to know where your energy comes from? Each supplier has a different fuel mix, which we summarise here.

Gas is usually extracted or imported, so this article concentrates on what powers the electricity for the energy suppliers in the UK.

All companies must publish this data as required by the Electricity (Fuel Mix Disclosure) Regulations 2005 and monitored by Ofgem, the industry regulator.

As investment in alternative energy sources continues, you’ll see the data change a lot in the coming years.

<= Swipe =>

Figures are for domestic customers where appropriate for the period 1st April 2024 to 31st March 2025. Renewable sources include offshore wind, onshore wind, solar, hydro and biomass. Data correct as at 27th January 2026.

All suppliers provide their fuel mix disclosure data in October each year. The UK averages are provided by the Department for Energy Security & Net Zero (DESNZ).

So there you have it – there’s a vast difference between the various UK energy companies on what fuel they use to generate the electricity you use in your home or business. Whether you think nuclear is best, coal or gas could be a factor in what company you use, apart from finding the cheapest fuel prices.

This transparency allows you to make an informed choice when deciding to switch electricity companies for lower prices.