Walney Extension
Located 19km west of Cumbrian coast, adjacent to Walney 1 & 2.
Status
Operationallifecycle stage
Ownership
Ørsted — 37.55% ◆
Brookfield Infrastructure Fund V — 12.45% ◆
PKA (via AIP Management) — 18.75% ◆PFAPFA — 18.75% ◆
Octopus Energy Generation — 12.5% ◆Location
United KingdomIrish Sea
Technology
Capacity
659 MW ◆
Turbines
87 × 7 MW ◆
Model
Siemens Swt 7-0-154 ◆
Foundation
Monopile ◆
Site & conditions
Site rights
Seabed rights held ∴
Origination
Crown Estate Round 1 & 2 site extensions (2010) · 2010 ·
Water depth
19–23 m ◆
Distance from shore
19 km ◆
Wind speed
9.8 m/s @ 100 m ≈
Revenue & grid
Offtake
CfD · FIDeR · £150/MWh ◆
Grid
Secured · 2018 ◆
Connection
Middleton 400kV substation, Heysham (OFTO: Diamond Transmission … ◆
Schedule
FID
28 Oct 2015 ◆
COD
2018-Q3 ◆
Project timeline & ownership verified milestones on the spine · ownership from Hafrok's transactions record
7 dated milestones on the spine, each with its source · 4 recorded ownership deals from Hafrok's transactions record · the developer's announced-COD history
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Revenue & offtake contract terms, price levels and the route to market
the contract terms on record · price over time in money of the day · the routes to market and the next visible round
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Installation how the build is going · from sourced statements and Hafrok's registers
construction status and turbines standing · vessel and port contracts · the grid connection and whether it is ready in time
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Sources & verification
Rests on 12 sources (10 primary) · ◆ 7 documents held
◆Verified≈Modelled◇Sourced∴Inferred⌁Convention○Unverified∅No source·Derived
Numbers are stable citation ids — grouped by source class, so they are not consecutive.
Regulator3
[1]
Planning Inspectorate2014-11-07◆ Walney Extension Offshore Wind Farm - Pr…
"This application was granted on 7 November 2014." The Secretary of State for Energy and Climate Change granted the Development Consent Order (DCO) for Walney Extension Offshore Wind Farm (EN010027), …
supportsConsentConsent appliedConsent granted
[13]
Department for Energy Security and Net Zero2026-05-06◆ Renewable Energy Planning Database (REPD…
“REPD Q1 2026 quarterly extract — Ref ID 2533: Site Name "Walney 3", Development Status "Operational", Installed Capacity 659 MWelec, Operator "Orsted (formerly Dong Energy)"”
supportsRegister entry
[17]
The Planning Inspectorate (PINS)2026-08-23◆ PINS national infrastructure application…
“Project reference EN010027: "Walney Extension Offshore Wind Farm"; applicant "DONG Energy Walney Extension (UK) Ltd"; Stage "Post-decision"; applied 2013-06-28; accepted 2013-07-22; decision 2014-11-0…”
supportsConsentConsent appliedConsent granted
Operator2
[8]
National Audit Office2014-06◆ Early contracts for renewable electricit…
"Administrative strike prices by commissioning date and technology (2012 GBP/MWh)" — Offshore wind: 2016-17 £150; 2017-18 £140; 2018-19 £140. FIDeR strikes are CPI-indexed; the same strike applies to …
supportsMechanismStrike / priceDetail
[14]
National Energy System Operator (NESO)2026-07-21◆ NESO Transmission Entry Capacity (TEC) R…
“NESO TEC Register, edition 21 July 2026 - PRO-000239: "Walney 3 Offshore Wind Farm", Status "Built", MW Connected 330, Effective From n/a, Customer "WALNEY EXTENSION LIMITED"; PRO-000240: "Walney 4 Of…”
supportsRegister entry
Auction results1
[19]
Low Carbon Contracts Company (LCCC)2026-07-31◆ lccc-portfolio-status-2026-07
Investment Contract units, all 'Live (Post-FIC)': INV-BUR-001 Burbo Bank Extension; INV-DUD-001/002/003 Dudgeon; INV-WAL-001/002 Walney Extension; INV-BEA-001/002 Beatrice; INV-HOR-001/002/003 Hornsea…
supportsInvestment contract · FID Enabling for Renewables (FIDeR) investment contracts
Trade press6
[2]
Offshore Engineer (OEDigital)2015-10-28
"Walney Extension, which had a final investment decision in October 2015" — DONG Energy announced FID for the 660 MW Walney Extension project on 28 October 2015, after securing all permits, completing…
supportsFinal investment decision
[3]
[9]
Diamond Transmission Partners
“660 MW connection between the generators and onshore transmission system. Two undersea cables up to 76 km in length connecting offshore substations to shore at Heysham. Approximately 4 km of onshore c…”
supportsStatusConnection point
[10]
[11]
offshoreWIND.biz2024-10
Press report — cited, not quoted; read it at the source link.
supportsoperatorowner
[12]
Early access