OverWatts Atlas Live map
Browse the atlas

United Kingdom · asset class

Power Plants in United Kingdom

The United Kingdom has 305 power plants mapped on the OverWatts open energy atlas — the 14th-largest fleet of the 155 countries that hold any, and 1% of the world's mapped total. Of these, 106 operating and 158 under construction or proposed. Operating generation capacity totals 67.5 GW across 106 utility-scale plants of 100 MW and above. The largest is Hornsea wind farm (5.6 GW).

The largest owner-operators are SSE Renewables (15), ScottishPower Renewables (12) and Nuclear Decommissioning Authority (United Kingdom) (11) — SSE Renewables alone is named on 5% of them. Half of United Kingdom's power plants in service predate 2009 (median commissioning year of the 106 with a known date), 26 came online in the past decade and the oldest still listed is Ffestiniog hydroelectric plant, dating from 1963. 158 are in the pipeline, led by Hornsea wind farm (5.6 GW), under construction. They account for 41% of every energy asset OverWatts maps in United Kingdom.

See them on the map →Power Plants worldwide →
305
Power Plant in United Kingdom
#14
of 155 countries
67.5 GW
Operating capacity
158
In construction / proposed

Operating generation capacity by fuel

On the interactive map

Open the interactive map →

Largest power plants in United Kingdom

Who owns United Kingdom's power plants

Counts an asset once per company named as its owner or operator; a joint venture counts for each partner.

When they were built

Median commissioning year 2009 · oldest Ffestiniog hydroelectric plant (1963) · newest Limekiln wind farm (2025) · 106 of 305 carry a start date

Under construction & proposed

How United Kingdom compares · power plants by country

Frequently asked

How many power plants are there in United Kingdom?
OverWatts maps 305 power plants in United Kingdom — 1% of the world's mapped total, the 14th-largest national fleet of the 155 countries with any.
What is the largest power plant in United Kingdom?
Hornsea wind farm, at 5.6 GW, operated by Ørsted.
How much power-generation capacity do United Kingdom's power plants have?
About 67.5 GW operating across 106 plants, with a further 171 GW under construction or proposed. That covers utility-scale sites of 100 MW and above, so it sits below national installed capacity wherever distributed generation is large.
Who owns the power plants in United Kingdom?
SSE Renewables is named as owner or operator on the most — 15 of 305 (5%). Next are ScottishPower Renewables (12), Nuclear Decommissioning Authority (United Kingdom) (11) and RWE AG (11).
How old are United Kingdom's power plants?
The median commissioning year is 2009, across the 106 in service with a known start date. The oldest still listed is Ffestiniog hydroelectric plant (1963); 26 came online in the past ten years.
What new power plants are being built in United Kingdom?
158 projects are under construction or proposed. The largest are Hornsea wind farm (5.6 GW), Berwick Bank wind farm (4.1 GW) and Dogger Bank wind farm (3.7 GW).

Other asset classes in United Kingdom

Oil & Gas Field 320Pipeline 36Cement Plant 18LNG Terminal 17Grid Storage 12Coal / Uranium Mine 10Interconnector 7Export Terminal 7Iron & Steel Plant 7Refinery 5Chemical Plant 3Oil / Commodity Contract 1

Power Plants in other countries

China 11,537United States 3,831India 1,675Brazil 879Spain 653Australia 615Philippines 489Russia 461Canada 452Vietnam 392Japan 387Germany 335