Outer Dowsing Offshore Wind

What Outer Dowsing Offshore Wind does

Outer Dowsing Offshore Wind is a pre-construction infrastructure project developing a 1.5GW offshore wind farm located approximately 33 miles (54km) off the Lincolnshire coast in the Southern North Sea. The project comprises up to 100 wind turbines connected via underground export cables from a landfall at Wolla Bank to an onshore substation at Surfleet Marsh, with grid connection to National Grid infrastructure at Weston Marsh. The project is structured as a private joint venture under the legal entity GTR4 Ltd, owned by TotalEnergies (operator, contributing 11+ GW of offshore wind portfolio experience), Macquarie Asset Management (through its 2024-established subsidiary Broadhelm Renewables), and Gulf Energy Development (Thailand's largest private power producer with 20+ GW of capacity). The project received UK Government Development Consent in February 2026 following a multi-year Planning Inspectorate examination process, with construction scheduled to begin in 2028 and first power targeted for November 2030.

The business model centres on long-term electricity generation and sale to the UK National Grid, displacing approximately 2 million tonnes of CO2 per year and powering the equivalent of 1.6 million UK households. The project represents an estimated £2 billion of UK investment over a 35+ year operational lifetime, creating over 1,000 construction jobs and hundreds of permanent operations roles. Revenue is not yet generated; future offtake will be determined through market mechanisms, power purchase agreements, or Contracts for Difference (CfD) schemes. The go-to-market approach is community-led, relying on extensive public consultation (five rounds, nearly 1,500 attendees across 16 events), four Community Liaison Groups, STEM outreach, and a planned Community Benefit Fund—all designed to secure and maintain local social licence ahead of construction.

The underlying technology combines conventional offshore wind generation with two notable engineering approaches: a hybrid offshore geotechnical investigation method (deep-push piezo-cone penetration testing combined with traditional boreholes, reducing vessel time at sea by approximately 50%) and horizontal directional drilling for underground cable installation beneath environmentally sensitive areas such as Anderby Marsh. The full underground cable routing eliminates new overhead lines, addressing the visual and environmental impact objections that have historically affected UK onshore transmission infrastructure.

Name

Outer Dowsing Offshore Wind

Legal name

GTR4 Ltd

Website

https://outerdowsing.com

Company type

Private

Founded year

2021

Operating status

Operating

Headcount range

11–50 employees

Short description

Outer Dowsing Offshore Wind is a pre-construction 1.5GW offshore wind farm project located 33 miles off the Lincolnshire coast, UK, developed as a joint venture by TotalEnergies, Macquarie, and Gulf Energy Development to generate electricity for the National Grid.

Ownership category

akta.pro rank

Product category

Offshore Wind Energy Generation

NAICS

Wind Electric Power Generation (221115)

SIC

Water, Sewer, Pipeline, Comm & Power Line Construction (1623)

akta.pro primary industry

Offshore Wind Power Generation (Fixed-Bottom) (EUACAFAB)

akta.pro secondary industries

Wind Farm Development & Permitting (Greenfield/Brownfield) (EUACAFAE), Wind Grid Interconnection & Power Systems (Transformers, Reactive Power, SCADA) (EUAMACAK), Wind Operations, Maintenance & Asset Management (Scheduled/Unscheduled) (EUAMACAH)

Keywords

• Offshore wind farm
• Renewable electricity generation
• Wind energy infrastructure
• Offshore wind development
• Green energy projects

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Infrastructure, Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. Electricity Generation and Sales: Outer Dowsing Offshore Wind generates renewable electricity (1.5GW capacity) for sale to the National Grid. The project will displace nearly 2 million tonnes of CO2 emissions per year and power the equivalent of 1.6 million households. Revenue is derived from long-term power purchase agreements or electricity market sales to National Grid as the transmission system operator.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels7 records

Core offering

Outer Dowsing Offshore Wind is developing a 1.5GW offshore wind farm located approximately 33 miles (54km) off the Lincolnshire coast, comprising up to 100 wind turbines. The project will generate renewable electricity equivalent to the annual consumption of over 1.6 million UK households, transmitted via underground cable from landfall at Wolla Bank through to a new onshore substation at Surfleet Marsh, connecting into the National Grid at Weston Marsh by November 2030.

Product overview

Outer Dowsing Offshore Wind is a single 1.5GW offshore wind farm project under development off the Lincolnshire coast. The core offering is the wind farm itself, which comprises offshore turbines, underground export cables, and an onshore substation at Surfleet Marsh. Supporting offerings include community engagement programs such as the Outer Dowsing Energise Workshops (STEM education) and the planned Community Benefit Fund for local environmental and social initiatives.

Differentiator

Problem solved

Functional benefit

Products and services

• Outer Dowsing Offshore Wind Farm A 1.5GW offshore wind farm located approximately 33 miles (54km) off the Lincolnshire coast, comprising up to 100 wind turbines. The project will generate renewable electricity equivalent to the annual consumption of over 1.6 million UK households, transmitted via underground cable from landfall at Wolla Bank to a new onshore substation at Surfleet Marsh, connecting to National Grid at Weston Marsh.

Quantifiable outcome

• 1.5 GW renewable electricity generation capacity
• +5 more outcomes

Named customers2 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Eleven partnerships are on record, tiered core and supporting.

• Broadhelm RenewablescoreStrategic or Co-development Partner · 1 January 2024Broadhelm Renewables was established in 2024 by Macquarie Asset Management (part of Macquarie Group) and invests in renewable energy assets with a focus on offshore wind. As a new entity created specifically to manage Macquarie's renewable energy investments, Broadhelm brings long-term capital commitment and green investment expertise.
• The Crown EstatecoreStrategic or Co-development Partner · 19 January 2023The Crown Estate granted Agreement for Lease for seabed area following competitive Round 4 offshore wind leasing process. The Crown Estate receives annual option fees until projects are ready to enter into seabed leases. Projects selected through competitive seabed tender to develop offshore wind capacity in UK waters.
• TotalEnergiescoreStrategic or Co-development Partner · 4 February 2022TotalEnergies is a global multi-energy company developing a portfolio of offshore wind projects with total capacity of more than 11 GW (2/3 bottom-fixed, 1/3 floating). As part of the joint venture, TotalEnergies contributes technical expertise, global energy transition experience, and commitment to net zero by 2050. The project will contribute to TotalEnergies' target of 100 GW renewable capacity by 2030.
• Gulf Energy DevelopmentcoreStrategic or Co-development PartnerGulf Development (GULF) is a holding company headquartered in Thailand and one of Thailand's largest private power producers with over 20 GW of gas-fired and renewable capacity. GULF brings nearly three decades of energy project management and operation experience with mission to invest in renewable energy and climate management aligned with net zero by 2050 targets.
• National Grid Electricity TransmissioncoreStrategic or Co-development PartnerNational Grid ESO conducted follow-up appraisal for grid connection options. National Grid Electricity Transmission is the Transmission Owner working with the project on final connection design. Project will connect to new National Grid substation at Weston Marsh connecting to existing overhead lines.
• Lincolnshire Wildlife TrustsupportingStrategic or Co-development PartnerLincolnshire Wildlife Trust project managed the purchase and construction of the bird hide at Anderby Creek, funded by Outer Dowsing Offshore Wind. The Trust manages Wolla Bank Reserve and local conservation areas. Partnership supports nature-positive community engagement theme.
• Anderby Parish CouncilsupportingStrategic or Co-development PartnerLocal parish council partnered with Outer Dowsing for the bird hide project at Anderby Creek. Supported the construction of the purpose-built hide located along King Charles III England Coast Path.
• Lincolnshire County CouncilsupportingStrategic or Co-development PartnerLincolnshire County Council supported the bird hide project at Anderby Creek. The council works with Outer Dowsing on careers events and the Greater Lincolnshire Careers Hub, with Outer Dowsing serving as Enterprise Advisers.
• AOC Archaeology GroupsupportingTechnology or IntegrationAOC Archaeology Group is currently working on Outer Dowsing's onshore archaeological surveys. Partnered with Outer Dowsing at Future Fest STEM tent to showcase archaeological finds from previous digs and demonstrate how offshore wind projects minimize archaeological impacts.
• Dalcour MaclarensupportingImplementation/ SI/ Consulting PartnerDalcour Maclaren serves as Land Agents for Outer Dowsing Offshore Wind, handling landowner-specific questions and property agreements for the cable route and substation land requirements.
• Boston Woods TrustsupportingStrategic or Co-development PartnerBoston Woods Trust partnered with Outer Dowsing to conserve a wildflower meadow at Dion's Wood Nature Reserve and Sir Joseph Banks Country Park in Boston, Lincolnshire. Funded as a stand-alone environmental conservation project.

Scale indicators7 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Equinor: Norwegian energy major with a significant UK offshore wind portfolio (Sheringham Shoal, Dudgeon, Dogger Bank A/B/C, Hywind). Comparable as a broad incumbent developing large-scale UK fixed-bottom and floating offshore wind, though Equinor operates across upstream oil & gas and multiple renewables segments.
• Vattenfall: Swedish state-owned utility with multiple UK offshore wind projects (Norfolk Vanguard/Boreas, East Anglia). Comparable as a broad incumbent developing UK fixed-bottom offshore wind through similar consenting and grid connection processes, though Vattenfall is much larger and more diversified.
• Ørsted: Global offshore wind leader with ~15 GW installed capacity and a deep UK North Sea portfolio including Hornsea 1/2/3. Comparable as a broader incumbent in UK offshore wind generation, though Ørsted operates a much larger and more diversified portfolio than the single-project Outer Dowsing vehicle.
• RWE Renewables: Global renewables developer with major UK offshore wind portfolio including Sofia, Triton Knoll, and Rampion. Comparable as a broad incumbent in UK offshore wind generation, with the relevant overlap being the Sofia project which is a near-identical direct peer.

Emerging players

• Corio Generation: Macquarie's former offshore wind specialist vehicle, restructured into Broadhelm Renewables in 2024. Highly comparable as the historical co-developer of Outer Dowsing under the original Corio/TotalEnergies JV, with the same UK and global offshore wind development focus and project pipeline.

Direct peers

• East Anglia ONE: 714 MW operational UK offshore wind farm developed by ScottishPower Renewables (Iberdrola) and Vattenfall. Direct comparable in UK fixed-bottom offshore wind generation business model, National Grid connection, and CfD revenue structure.
• Hornsea 3: ~2.9 GW UK offshore wind project in the North Sea developed by Ørsted, currently in development/construction. Direct peer in UK fixed-bottom offshore wind with similar consenting process, supply chain dynamics, and CfD revenue model exposure.
• Sofia Offshore Wind Farm: 1.4 GW fixed-bottom offshore wind farm on Dogger Bank in the UK North Sea, developed by RWE. Sofia is one of the closest direct comparables to Outer Dowsing in capacity (1.4 GW vs 1.5 GW), geography (UK North Sea), fixed-bottom technology, and pre-COD/consenting stage profile.
• Dogger Bank Wind Farm: 3.6 GW UK offshore wind project (phases A/B/C) developed by SSE Renewables and Equinor, also located in the North Sea. Highly comparable as a UK Round 4-era utility-scale fixed-bottom offshore wind development project with similar consenting and grid connection mechanics.
• Norfolk Vanguard: 1.8 GW UK offshore wind farm developed by Vattenfall off the Norfolk coast. Direct peer as another UK Round 3-era fixed-bottom offshore wind project with similar grid connection and consenting profile, comparable in capacity and geography.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/outer-dowsing-offshore-wind

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Outer Dowsing Offshore Wind