East Anglia ONE, the largest renewable project in Iberdrola's history, comes into operation

East Anglia ONE offshore wind farm has become operational in UK waters. With 714 MW of installed capacity and 102 wind turbines, it is one of the biggest offshore wind farms in the world.

North Sea (United Kingdom)

Wind turbines number
102 WTG E19 Siemens Gamesa turbines

Total area
300 km2

Total installed capacity
714 MW

£2.5 billion

Start date

East Anglia ONE

The East Anglia ONE wind farm — built by Iberdrola through its UK subsidiary, ScottishPower Renewables — is fully operational since mid-2020.

Located in British waters and with 102 wind turbines, it is the largest initiative by a Spanish company in the history of renewable energies and one of the largest offshore wind farms in the world. Thanks to an installed capacity of 714 MW, the farm will supply clean energy to nearly 630,000 British homes.

Placed in the North Sea — about 50 kilometres from the coast of the English county of Suffolk —, East Anglia ONE had an investment of 2.5 billion pounds and is owned 60 % by Iberdrola group and 40 % by the Green Investment Group (GIG), of the Macquarie group.

The construction of East Anglia ONE has driven Europe's fledgling offshore wind farm industry, employing more than 1,300 people in several countries (Spain, the United Kingdom, the Netherlands, the United Arab Emirates) and being key for various industries, such as the naval sector.

The planned maintenance at the wind farm will be performed by James Fisher Marine Services (JFMS). The contract will have a positive impact on the local area around Lowestoft, as it will create at least 20 new jobs while work is being carried out by the company both on land and offshore to service the wind farm. JFMS has already undertaken a number of tasks on the Project.


  • The farm covers an area of 300 km2, which is equal to 40,000 football pitches.
  • East Anglia ONE features 102 wind turbines, each producing 7 MW, supplied by Siemens Gamesa. They reach a height of 167 metres (two metres higher than the Iberdrola Tower in Bilbao, Spain), with 75 metre long blades.
  • The jacket type foundations were manufactured by Navantia in Fene (Galicia, Spain) and by Lamprell in the United Arab Emirates and by Harland & Wolff in Belfast (Ireland). Windar built the piles in Avilés (Asturias, Spain).
  • The Andalucía II marine substation, manufactured by Navantia in Puerto Real (Cádiz, Spain), will be in charge of collecting the electricity produced by the wind turbines and transforming the voltage to transport it to the coast. To do so, two transmission cables, each nearly 85 km long, were laid on the sea bed.
  • These cables are connected to a further six underground cables approximately 37 km long, from Bawdsey to a new transformer at the land-based Burstall sub-station, which connects the offshore wind farm to the national grid.
  • The maintenance and operations base, located in Lowestoft Port, will handle daily operations for the fleet over its 30+ year working life. Opened in 2019, it consists of the maritime coordination centre, technical offices and warehouse, and about a hundred people are employed on site.


 'The East Angle' magazine. Summer 2019 issue: "East Anglia Offshore Windfarm Projects"

 East Anglia ONE: turbines [PDF]

 East Anglia ONE: jacket foundations [PDF]

 East Anglia ONE: offshore substation [PDF]

 East Anglia ONE: jackets [PDF]

 East Anglia ONE: offshore wind turbine [PDF]


Within the framework of the United Nations Climate Change Conference (COP25), Iberdrola group presented the United by the wind documentary, which shows the most social aspect of the East Anglia ONE offshore wind farm. More than twenty workers, both from the company and from several of its suppliers, tell us about the importance of teamwork, companionship and training to set up an infrastructure of this magnitude and complexity, as well as the driving effect that this development is having on local economies.

 Access the full documentary


East Anglia ONE is part of a much more ambitious project. Iberdrola will be promoting a macro wind farm called East Anglia Hub, which will incorporate another three farms: East Anglia ONE North, East Anglia TWO and East Anglia THREE. Work will begin on the new development, which will add up to a total installed capacity of 3,100 MW, in 2022 and will require an investment of 6.5 billion pounds (more than 7.6 billion euros).

Learn more about East Anglia HUB offshore wind complex. Access.


In response to the company's on-going commitment to wind power research and innovation, ScottishPower is developing the Frond Mats initiative (vegetation covers) in the waters of the East Anglia ONE offshore wind farm, which uses synthetic undersea vegetation to reduce the effects of currents and is designed to protect wind turbines from the effects of erosion, resulting in huge economic savings.