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EDF Energy

Backed by the UK’s biggest nuclear generator

<60%
Which? customer score
Nuclear
UK’s largest generator
Low-carbon
Generation mix

Pros

  • Backed by the UK’s largest nuclear generation fleet
  • Low-carbon electricity mix

Cons

  • Scored below 60% in Which?’s 2026 customer satisfaction survey

Why consider EDF Energy

EDF Energy is backed by EDF’s UK nuclear fleet, one of the country’s largest sources of low-carbon electricity — alongside fixed-rate price protection options.

How switching works

1

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2

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3

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Frequently asked questions

Where does EDF Energy’s electricity come from?

EDF is backed by the UK’s largest nuclear generation fleet, which produces a genuinely low-carbon electricity mix — a different route to low-carbon supply than wind/solar-backed competitors.

Is it free to switch energy supplier?

Yes — switching suppliers in the UK is free, and by law your physical energy supply is never interrupted during a switch.

How long does switching take?

Typically around 3 weeks from agreeing to switch to your new supplier taking over, though some suppliers offer faster switches.

Will I lose supply while I switch?

No — the gas and electricity itself doesn’t change, only who bills you for it. No engineer visit or physical work is needed at your property.

Can I switch if I’m on a fixed-term contract?

Usually yes, penalty-free, if your current term ends within 49 days. Switching earlier may trigger an exit fee — worth checking your current contract first.

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Overview above is real and sourced (Which? 2026 energy survey). Live tariff pricing pending real rate data.