Renewable energy generates 90% of the U.K.’s electricity for the first time ever

Story: 2035 C.E. ???  |  Last updated: January 8, 2026

Note: This is an imagined future story, written as if a projected milestone has occurred. It is based on current trends and evidence, not confirmed events.

For the first time in recorded history, renewable sources generated 90% of the U.K.’s electricity over a full calendar year — a milestone that seemed ambitious a decade ago but now reflects the steady, deliberate work of engineers, policymakers, and communities across Britain. Wind, solar, and hydropower collectively pushed fossil fuels to the margins of the national grid, leaving gas as little more than a backup for the most demand-heavy winter days.

Key projections

• Renewable energy: Wind power — offshore and onshore combined — supplied roughly 65% of total electricity generation in 2035 C.E., making it the dominant source on the U.K. grid by a wide margin.
• Solar capacity: Solar photovoltaic installations expanded dramatically through the early 2030s C.E., contributing around 15% of annual generation, with rooftop systems on homes and businesses playing a growing role alongside utility-scale farms.
• Grid storage: Battery storage capacity scaled to over 30 gigawatts across the U.K. by 2035 C.E., allowing surplus wind generation to be banked and dispatched during calm periods — the critical technical leap that made 90% renewable power viable year-round.

How the U.K. got here

The trajectory was already visible in the early 2020s C.E. By that point, renewables were regularly supplying more than half of U.K. electricity, and wind had overtaken gas as the single largest source of power generation. The trend was not a straight line — grid operators faced real pressure during cold, still winter weeks when offshore turbines sat idle.

What changed was storage and interconnection. The U.K. expanded its subsea cable links to Norway, Denmark, and France, giving the grid access to Norwegian hydropower as dispatchable backup. At the same time, the government’s contracts-for-difference auction scheme drove the cost of offshore wind to levels competitive with any energy source on earth.

Communities that once depended on North Sea oil and gas jobs did not all benefit equally from this shift. Retraining programs helped some workers transition into offshore wind installation and maintenance roles, but the pace of industrial change outran support in several Scottish and northeast English towns — a tension that policymakers have acknowledged but not fully resolved.

The role of offshore wind

Britain’s geography made offshore wind its single greatest energy asset. The shallow waters of the North Sea, combined with some of the strongest average wind speeds in Europe, gave U.K. developers a natural advantage. Projects like Dogger Bank — already the world’s largest offshore wind farm when its final phase completed — demonstrated that gigawatt-scale offshore power was both technically and financially achievable.

By 2035 C.E., the U.K.’s total installed offshore wind capacity had grown to levels that would have seemed extraordinary in 2020 C.E. National Grid has tracked this expansion closely, noting that renewables’ share of the electricity mix has climbed sharply in each successive decade. The U.K. was one of many countries riding a global wave of renewable energy adoption, but its island geography and North Sea resources gave it particular momentum.

What 90% actually means — and what it doesn’t

The 90% figure refers to electricity, not total energy. Heating, heavy industry, and aviation still rely heavily on gas, oil, and emerging hydrogen pathways. Electricity is roughly 20% of total U.K. energy consumption, which means the broader decarbonization challenge remains substantial even after this electricity milestone.

Grid operators also note that the annual average masks seasonal peaks and troughs. In summer 2035 C.E., renewables briefly covered 99% of demand on several consecutive days. In January, during a prolonged wind drought, gas plants ran at higher capacity to keep the lights on. The 90% figure is a genuine achievement — and an honest one, averaged across a full year of real-world variability.

Demand-side flexibility also played a quiet but important role. Smart meters, electric vehicle charging programs, and industrial demand-response agreements allowed grid managers to shift load away from peak moments, easing pressure on the system during the hours when renewable supply was thinnest.

What comes next

Reaching 90% was the milestone. Getting to 95% or beyond is the harder problem. The remaining 10% of electricity generation — the portion that gas currently covers — represents the most difficult slice to decarbonize, because it consists almost entirely of demand that occurs precisely when renewable output is lowest. Long-duration storage, green hydrogen, and expanded interconnection are the leading candidates, but none has yet scaled to fill that gap at the speed needed.

Climate scientists have long argued that a high-renewable grid is a prerequisite, not a destination — the electricity system must be clean before electrifying heat and transport makes full sense. The U.K. reaching 90% renewable electricity sets a foundation for that wider shift, but the harder industrial and economic work still lies ahead.

The International Renewable Energy Agency has pointed to the U.K. as a model for rapid offshore wind scaling, and several nations in the Global South with strong wind and solar resources are studying the policy mechanisms — particularly the auction structures — that drove British capacity growth. Whether those models translate to contexts with different grid infrastructure and financing conditions remains an open question.

Carbon Brief’s long-running analysis of U.K. electricity generation shows that the shift has been faster than most energy models predicted in 2010 C.E. — a reminder that technological and policy progress can surprise even careful forecasters. Whether that optimism extends to the global picture, where coal remains dominant in many economies, is the bigger and harder story.

Read more

For more on this story, see: National Grid — How much of the U.K.’s energy is renewable?

For more from Good News for Humankind, see:

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• The Good News for Humankind archive on renewable energy

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