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What are we doing to help?

We’re committed to securing the UK’s energy future with an energy mix that balances the need for low-carbon emissions, security of supply and affordability.

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Generating energy

We operate the power stations and wind farms that generate around 20% of all UK electricity. We operate a total of eight nuclear power stations and have plans to expand Hinkley Point and Sizewell. We believe that nuclear energy will play a key role in future supply of clean, affordable energy.  

The UK energy mix

There are four main things to consider when reviewing the right balance of energy mix for the UK:


Every energy source has its strengths and weaknesses. It could be limited in supply, which could eventually lead to interruptions in the supply of electricity.

Take fossil fuels for example. They are finite resources and one day they will eventually run out.

And there’s renewable energy sources from wind, sunlight and water. They’re seemingly inexhaustible and definitely a good idea, yet they come with their own set of limitations.

It takes a lot of money and many years to locate sites, plan and build new power stations. And despite Government commitments to low-carbon energy targets, there are many hurdles to overcome.

Heavy investment in offshore wind farms means that wind power will play a much larger part in our overall energy mix. Plus, new nuclear power stations are also planned for the UK. 


When we talk about security, we mean having the right amount of fuel to maintain an electricity supply.

Where fuel comes from is important. If the UK relies too heavily on imported fuel, it will be exposed to fluctuating market prices and various disruptions to supply.

Materials such as uranium, used to generate nuclear energy are imported however due to its high energy density and availability from several countries; it can be used and stored relatively easily.

In the UK,  there is a limited supply of coal and gas, so it needs to import a lot of this too. However, the UK  shouldn’t rely on it in the long term.

We can boost our energy security by reducing our dependence on imports and using more renewable sources, such as wind, solar and marine, that can all produce energy that can be stored.


A reliable energy source is one that is able to consistently produce energy and can meet peaks in demands. That’s why having the right mix of energy sources is good. Because when electricity sources are flexible it means output can be altered fairly quickly to meet demand.

It’s important to maintain a base level of power, the minimum needed to keep your house lights on. But an effective way of storage is also important so it can be called upon if it’s needed. 


This is determined as the amount energy suppliers pay to electricity generators for the electricity required to meet demand.

What’s going to determine the future price of electricity? The answer, as you might expect, is complex.

With many of the UK’s existing power stations due to close in 10 to 15 years, a lot of investment is needed to build new power plants. At the same time, technology is rapidly advancing which could inevitably make energy more efficient and affordable. And that’s good news.

Our fuel mix

Every year we must publish details of the fuel sources that have been used to generate the electricity we supply to our customers. The information in the table below covers our supply licence for EDF Energy Customers plc for the period from April 2017 to March 2018. Our customers' electricity is sourced from our own UK power stations, the wholesale energy market and other independent power generators.  We are a major supporter of independent renewable generators.

 CoalGasNuclearRenewableOtherCO2 g/kWhRadioactive waste g/kWh
EDF Energy's fuel mix7.55%9.39%71.21%11.66%0.19%1040.0050
Contribution to our carbon emissions66.60%32.20%0.0%0.0%1.20%  
UK average fuel mix7.64% 41.24%20.01%29.04%2.07%2250.0014

The figures for UK average fuel mix are provided by the Department for Business, Energy & Industrial Strategy (BEIS). Depending on the tariff you are on, the fuel source and carbon emissions associated with the generation of your electricity may vary. For more information on our fuel mix, visit edfenergy.com/fuelmix

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How we operate

Everything we do is guided by our values, our operating principles and our set of ambitions.