If you want the UK to be totally independent for energy and also run data centers . You will need SMR's .
If you want to continue with a hybrid that relies on oil or LNG. You do solar and wind

March 21, 2026 - 23:29 UTC

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So far only a few prototype SMRs exist. They are more expensive per MW than big powerplants so it would probably need a few thousand to make them economical viable. For that amount of money you could build humongous amounts of sodium ion batteries that would cover all production
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gaps of the renewables many times over. Plus they would help stabilise grid frequency and would cut peak loads. So less curtailment costs for the installed solar and wind capacity.
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