Offshore Wind
Leasing Round 4

Unlocking new areas of seabed for the generation of low-carbon energy for millions more homes by 2030

Towards a net zero clean energy future

Offshore Wind Leasing Round 4 creates the opportunity for at least 7 GW of new offshore wind projects in the waters around England and Wales by the end of the decade. That’s enough to power more than six million homes and deliver a step-change in the UK’s journey to net zero by 2050.

Round 4 has the potential to further strengthen the UK’s world leading offshore wind sector, create jobs and investment, and deliver green, reliable, affordable energy to millions more homes. It’s part of our commitment to supporting the UK’s low-carbon future while ensuring we maintain our healthy, biodiverse seas.

The projects identified through this process will join a strong pipeline of UK offshore windfarms already in operation, construction and planning, and will help put the UK on track to meet the government target for 40GW of offshore wind capacity by 2030.

Learn more about the Leasing Round 4 journey so far - and what happens next - below, or download our briefing sheet.

Please note that the timings for Round 4 have been updated since the Information Memorandum was issued. We are now progressing with Invitation to Tender Stage 2 and bidding cycles are expected to take place in early 2021. For the latest information on timings for Round 4, please see the five-stage leasing process below.

Find out more through the Information Memorandum

The Round 4 leasing process

The Round 4 leasing process consists of five stages - find out more about each of these below. Timings for future stages remain indicative and are subject to change.

Pre-qualification Questionnaire (PQQ)

Assesses potential Bidders' financial capability, technical experience and legal compliance, with successful Bidders pre-qualifying for the ITT Stage 1 process (becoming a Pre-qualified Bidder).

Invitation to Tender Stage 1 (ITT Stage 1)
Spring 2020 - Summer 2020

Assessing the financial and technical robustness of projects submitted by Pre-qualified Bidders. Projects that pass then become eligible to take part in the ITT Stage 2 process (becoming Eligible Bidders with Eligible Projects).

Invitation to Tender Stage 2 (ITT Stage 2)
Autumn 2020 (first phase), Early 2021 (second phase)

A multi-cycle bidding process in two phases, with issue of the ITT Stage 2 tender documentation in late 2020, followed by Bidding Cycles in early 2021. Using option fees bid by Eligible Bidders to determine award, one project is awarded per daily Bidding Cycle, with Bidding Cycles continuing until the 7 GW has been awarded or exceeded (up to 8.5 GW).

Plan-Level Habitats Regulations Assessment (HRA)
Spring 2021 – Spring 2022

Estimated to take between 9 and 12 months, the HRA assessment is undertaken by The Crown Estate in its role as a Competent Authority, and considers the possible impacts of Round 4 on relevant nature conservation sites of European importance.

Agreement for Lease
Spring 2022

We expect we could enter into a Wind Farm Agreement for Lease with successful Bidders in Spring 2022, subject to the outcome of the HRA

Our objectives for Leasing Round 4

Round 4 is defined by five objectives – which strike a careful balance between meeting the needs of the nation for clean, reliable, low-cost power, while protecting our healthy seas and the wider natural environment.

Delivers a robust pipeline for low-cost offshore wind deployment,

to help meet industry appetite and Government policy objectives for new offshore wind capacity, supporting the UK’s clean energy transition.

Offers an attractive, accessible and fair proposition to developers,

at repeatable scale, contributing to the development of a competitive, resilient and innovative offshore wind market.

Balances the range of interests in the marine environment,

supported by extensive engagement with stakeholders and the promotion of responsible evidence-based site selection.

Makes efficient use of the seabed,

recognising its value as a national asset, now and for the long term.

Unlocks the commercial value of the seabed in line with our statutory obligations,

securing best consideration over the long-term, for the benefit of the public finances.

Designing Leasing Round 4

Round 4 was developed and refined through 18 months of active engagement with stakeholders and industry, keeping them informed of our thinking and seeking their feedback to help shape its design through events, workshops, webinars and updates.

Their valuable feedback and comments helped develop and refine the final scale, location and nature of Round 4.

Read more

Identifying seabed Bidding Areas

With long coastlines, favourable wind conditions and shallow waters in many areas, the UK offers world-class natural resources for offshore wind. But the UK seabed is increasingly busy, with demands ranging from cables, pipelines and sand & gravel extraction, to navigation, fisheries and aquaculture. There is also the need to maintain an ecologically coherent network of marine protected areas. Throughout our planning for Round 4, we used data & analysis alongside engagement with a wide range of stakeholders to help strike this careful balance.

Following extensive spatial analysis and stakeholder engagement, we built a detailed evidence base to help us identify areas of seabed that offer the least constrained (most technically favourable) areas for offshore wind development – refined into four Bidding Areas.

These four Bidding Areas – Dogger Bank, Eastern Regions, South East, and Northern Wales & Irish Sea - are well suited to lower cost, fixed foundation offshore wind turbine technologies, offering the strongest opportunities for development at the current time.

Each area has waters up to 60 metres depth, and is less constrained than other areas by factors including: Ministry of Defence ranges and exercise areas; visual sensitivity within 13 km of shore; overlap with busy shipping routes; and major consenting risk due to cumulative environmental impacts, particularly ornithology. Our Round 4 tender has been designed to ensure that projects come forward across a minimum of three of these four Bidding Areas, helping to ensure geographic diversity of the pipeline and support the resilience of the UK’s energy system.

You can find the details of this important work in our Resource and Constraints Assessment Methodology ReportCharacterisation Areas Reports and Regions Refinement Report in the Round 4 document library.


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    Bidding Area 1

    Dogger Bank

    The Dogger Bank Bidding Area, located off the north east coast of England, offers a large area of potential development resource (approx. 22,000km2) and is located furthest from shore (almost 300km at the furthest point). Water depths are generally shallow and most parts of the Bidding Area have a water depth in the range of 20m to 40m, making it well suited to lower cost, fixed foundation offshore wind technologies, with some deeper sections, particularly in the north.

    A map of Bidding Area 1
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    Bidding Area 2

    Eastern Regions

    The Eastern Regions Bidding Area, comprising the Southern North Sea region, the eastern part of The Wash region, and the East Anglia region, offers a large area of potential development resource (approx. 20,000km2). Water depths are generally shallow (with an average water depth of 33m), making it well suited to lower cost, fixed foundation offshore wind technologies.

    A map of Bidding Area 2
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    Bidding Area 3

    South East

    The South East Bidding Area, located off the south coast of England, covers an area of approximately 7,000km2. The Bidding Area has an average water depth of 37m, with most of the Bidding Area within the 30m to 50m depth range, making it well suited to lower cost, fixed foundation offshore wind technologies.

    A map of Bidding Area 3
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    Bidding Area 4

    Northern Wales & Irish Sea

    The North Wales and Irish Sea Bidding Area, comprising the North Wales and Irish Sea region, and the northern part of the Anglesey region, covers an area of approximately 8500km2. The Bidding Area has an average water depth of 34m, with most of the bidding area within the 30m to 50m depth range, making it well suited to lower cost, fixed foundation offshore wind technologies.

    A map of Bidding Area 4

The four available seabed Bidding Areas for Leasing Round 4 are: Dogger Bank, Eastern Regions, South East, and Northern Wales & Irish Sea.

Click on each seabed Bidding Area to find out more. 

You can also view a PDF of the seabed Bidding Areas map here.

For GIS shape files of the seabed Bidding Area boundaries, Characterisation Areas, and hard constraints, please visit our Open Data Portal.

Protecting the marine environment

Projects selected through the Round 4 tender, will progress to an environmental assessment known as a Plan-Level Habitats Regulations Assessment (HRA), which assess the potential impacts of Round 4 on the network of protected areas covering the UKs most valuable species and habitats.

Estimated to take between 9 and 12 months, the HRA assessment is a legal requirement, which must be completed before The Crown Estate can award seabed rights, and is an important step in helping to preserve the UK’s precious marine environment. It is undertaken by The Crown Estate in its role as a Competent Authority.

Subject to a successful HRA outcome, developers will then be able to progress projects through the planning process, in which local communities and stakeholders will have an opportunity to participate.

The planning and development process

Following our leasing process, successful developers will take their projects through a number of important licensing and consenting processes.

Development and Consenting: estimated five years

Round 4 projects will need to apply for a Development Consent Order (DCO) from the Secretary of State for Business, Energy & Industrial Strategy via the Planning Inspectorate. Developers will also require consent to construct a cable connection onshore, and an agreement to connect to the National Electricity Transmission System.

Procurement and Contracts for Difference (CFDs): estimated two years

Developers take part in Contract for Difference (CfD) auctions to bid for support to build and run the wind farm. They also make their final investment decision.

Construction: estimated three years

Energy regulator Ofgem (The Office for Gas and Electricity Markets) also runs a separate competitive tender process to operate the offshore transmission assets, which are assigned to the successful bidder once the windfarm is constructed and commissioned.

Enabling sustainable growth

We know that as the marine environment becomes busier, collaboration and a ‘whole system approach’ is key to the continued, sustainable growth of the offshore wind sector.

Alongside our work on offshore wind leasing, we have launched a new partnership, to unlock offshore energy ambitions and protect the nation’s marine environment, known as the Offshore Wind Evidence and Change Programme.

This programme, is being delivered in partnership with Department for Business, Energy and Industrial Strategy and the Department for Environment, Food and Rural Affairs, and in collaboration with a wide range of other stakeholders.

It will work to tackle the huge challenges posed by so many overlapping and often conflicting demands for seabed space, providing the evidence for the future designs of vibrant and productive seas around our country. It will help us to tackle the cumulative environmental impacts of offshore wind, and its effects on users of the sea and onshore communities. By working together in this way, we aim to facilitate the coordinated growth of the sector, whilst supporting action to secure clean, healthy, productive and biologically diverse seas.

More about our Offshore Wind Evidence and Change programme

For general enquiries on Leasing Round 4

Please email:
[email protected]

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