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Balfour Beatty wins contract for substation connecting three Dogger Bank wind farms

Balfour Beatty wins contract for substation connecting three Dogger Bank wind farms

Built World

First phase of the 400kV station in East Yorkshire covers design and site preparation, with commissioning due in 2030

October 23rd, 2026: Balfour Beatty wins first phase contract

Overview

Updated Oct 25

Balfour Beatty has won the first phase of National Grid's Birkhill Wood 400kV substation in East Yorkshire, the station that will carry power from three planned Dogger Bank wind farms onto the grid. The award came through National Grid's £8 billion Electricity Transmission Partnership, under which Balfour Beatty became delivery partner for North East England in 2025.

National Grid puts the three wind farms at 4.22 GW, enough for more than four million homes. Substation commissioning is due in the second quarter of 2030, with the wind farm connections finished by the end of that year. The station will use gas-insulated switchgear, which takes less space than an open-air design, and needs two extra 40-metre pylons to loop the existing overhead line into the site.

Why it matters

The substation is the grid connection point for 4.22 GW of offshore wind; any delay pushes UK clean power targets back.

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Key Indicators

4.22 GW
Offshore wind connecting at Birkhill Wood
National Grid's figure for the three wind farms, including the proposed Dogger Bank D
~4 million
Homes to be powered
Balfour Beatty's estimate for the three connected wind farms
3
Wind farms connecting at substation
Dogger Bank South East, Dogger Bank South West, and Dogger Bank D
~200
Peak workforce on the build
Including apprentice and graduate roles, per Balfour Beatty
£8.6bn
Five-year network investment in Yorkshire and North East
National Grid's planned spending in the region over the next five years

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Organizations Involved

Balfour Beatty plc
Balfour Beatty plc
Infrastructure contractor
Contractor for Birkhill Wood first phase

International infrastructure group delivering the first phase of National Grid's Birkhill Wood substation.
National Grid
National Grid
Electricity transmission operator
Owner and developer of Birkhill Wood substation

The UK's electricity transmission system operator, building Birkhill Wood to connect offshore wind to the grid.
RWE
RWE
Energy company
Co-developer of Dogger Bank South East and South West

German energy company developing the two 1.5 GW Dogger Bank South wind farms with Masdar.
Masdar
Masdar
Clean energy company
Co-developer of Dogger Bank South East and South West

UAE clean energy company partnering with RWE on the Dogger Bank South projects.
SSE Renewables
SSE Renewables
Renewable energy developer
Co-developer of Dogger Bank D

UK renewable energy developer co-developing the proposed Dogger Bank D phase with Equinor.
Equinor ASA
Equinor ASA
Energy company
Co-developer of Dogger Bank D

Norwegian state-owned energy company co-developing Dogger Bank D with SSE Renewables.

Timeline

2025 2032

13 events Latest: October 23rd, 2026 · 3 weeks ago Showing 8 of 13
Tap a bar to jump to that date

  1. Dogger Bank South West commissioning expected

    Upcoming Milestone

    Second 1.5 GW Dogger Bank South wind farm expected to begin commissioning.

  2. Dogger Bank South East commissioning expected

    Upcoming Milestone

    First 1.5 GW Dogger Bank South wind farm expected to begin commissioning.

  3. Substation commissioning expected

    Upcoming Milestone

    Birkhill Wood substation commissioning and third-party wind farm connections expected during 2030.

  4. Main construction set to begin

    Upcoming Construction

    Substation construction works expected to start, following access road completion.

  5. Balfour Beatty wins first phase contract

    Latest Contract

    Balfour Beatty awarded first phase contract for Birkhill Wood covering design and enabling works.

  6. North Humber to High Marnham application submitted

    Regulatory

    National Grid sent its Development Consent Order application for the 400kV line to the Planning Inspectorate. Birkhill Wood is the northern end of the proposed connection.

  7. Construction of the A1079 access road begins

    Construction

    National Grid started building the new 2km access road from the A1079, intended to keep construction traffic off local roads.

  8. Dogger Bank South secures development consent

    Regulatory

    Dogger Bank South East and West secure development consent from UK government.

  9. Compulsory purchase order confirmed

    Legal

    Government confirms compulsory purchase order for the Birkhill Wood project.

  10. Permission granted for overhead line diversion

    Regulatory

    The Department for Energy Security and Net Zero approved the short diversion of the existing overhead line into the substation site, which requires two extra pylons about 40 metres tall.

  11. Planning approval granted for Birkhill Wood

    Regulatory

    East Riding Council grants planning permission for the Birkhill Wood substation.

  12. Dogger Bank South secures CfDs

    Policy

    Dogger Bank South East and South West awarded contracts for difference in UK Allocation Round 7.

  13. Balfour Beatty joins electricity transmission partnership

    Contract

    Balfour Beatty named delivery partner for North East England under National Grid's £8bn transmission partnership.

Scenarios

1

Birkhill Wood substation energised by 2030

Likely Resolves by Q2 2031

Discussed by: National Grid project programme; industry sources cited by Offshore Wind

Main construction starts in Q2 2027 as scheduled. The station energises in Q2 2030 and third-party wind farm connections complete by Q4 2030. Dogger Bank South developers make final investment decisions in 2027, keeping commissioning on track for 2031 and 2032.

2

Construction delays push Birkhill Wood past 2030

Possible Resolves by End of 2027

Discussed by: Supply chain analysts tracking grid connection bottlenecks

Gas-insulated switchgear shortages, grid connection queue pressures, or site consent challenges delay main construction beyond Q2 2027, moving commissioning into 2031 or later.

3

Dogger Bank South FID slips past 2027

Possible Resolves by End of 2027

Discussed by: RWE and Masdar investor communications; offshore wind project finance press (Recharge, Wind Power Monthly)

RWE and Masdar fail to reach final investment decisions for Dogger Bank South East and West during 2027, pushing wind farm commissioning beyond 2031 and 2032. The substation would still be built, but its utilisation would be delayed.

Historical Context

One moment from history that rhymes with this story — and how it unfolded.

Spring 2023 – 2024

Dogger Bank A and B connect at Creyke Beck (2023–2024)

The first two phases of the Dogger Bank offshore wind farm, developed by SSE Renewables, Equinor and Vårgrønn, connected to the UK grid at the existing Creyke Beck substation, located roughly 700 metres south of the current Birkhill Wood site. Dogger Bank A completed in spring 2023 and Dogger Bank B in 2024.

Then

Established Creyke Beck as the grid hub for the Dogger Bank zone and demonstrated that Yorkshire's transmission network could absorb large offshore wind volumes.

Now

Showed the existing substation could not handle additional phases, leading directly to the planning and development of Birkhill Wood for the next three wind farms.

Why this matters now

Birkhill Wood is the direct successor to this earlier grid build-out, adding new connection capacity for Dogger Bank South East, South West, and D.

Sources

(8)
+2
Balfour Beatty Offshore Wind National Grid Construction Intelligence BBC News 4C Offshore National Grid National Grid