# The Outer Dowsing Offshore Wind Farm Order 2026, Paragraph 37: Wake Effects


(1) No construction of any part of any wind turbine generator may be commenced as part of the authorised project until either:
(a) a wake effects plan relating to that part of the authorised project has been submitted to and approved by the Secretary of State following consultation with each of the owners of the relevant offshore wind farm(s); or
(b) the undertaker has provided evidence to the Secretary of State that alternative mitigation for wake effects has been agreed with each of the owners of the relevant offshore windfarms; or
(c) a combination of (1)(a) and (1)(b) is provided to and agreed by the Secretary of State to ensure that any wake effects of the authorised project on each of the relevant offshore wind farm(s) are considered.
(2) Any wake effects plan provided in accordance with paragraph (1) must include:
(a) the wake effects from the authorised project on the annual energy production of the relevant offshore windfarm(s);
(b) details of reasonable steps that have been taken in the final design of the authorised project or measures which will be applied during the operation of the authorised project (or a combination of both) to minimise any wake loss effects from the authorised project on the relevant offshore wind farm(s), provided that this shall not require the undertaker to materially reduce the capacity of the authorised project;
(c) the timescales for implementation of any wake effect mitigation measures;
(d) any time limits for any wake effect mitigation measures; and
(e) details of consultation with each of the owners of the relevant offshore windfarm(s) and the extent of any agreement or disagreement with them regarding whether any design changes or operational measures could further reduce any wake effect impacts.
(3) In order to facilitate the undertaker’s compliance with the above:
(a) The undertaker must consult with the owners of the relevant offshore wind farm(s) as early as reasonably practicable to identify the details including relevant wind turbine generator parameters of their respective projects which may be at risk of wake loss impacts from the authorised project; and
(b) The owners of the relevant offshore wind farm(s) must make available to the undertaker all information in their possession reasonably requested by the undertaker in respect of such details and parameters for the relevant offshore wind farm(s) pursuant to sub-paragraph (3)(a).
(4) Any approved wake effects plan submitted under this requirement must be implemented as approved.
(5) The design plan submitted to the MMO under condition 13(1)(a), part 2 of schedule 10 to this Order must be in accordance with any approved wake effects plan.
(6) For the purposes of this requirement—
“relevant offshore wind farm(s)” means Race Bank offshore wind farm, Dudgeon Offshore Wind Farm, Hornsea 1 offshore wind farm, Hornsea 2 offshore wind farm, Sheringham Shoal offshore wind farm, Dudgeon Extension offshore wind farm and Sheringham Shoal Extension offshore wind farm.

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Source: https://www.legislation.gov.uk/uksi/2026/138/schedule/1/paragraph/37 (the official version)
Page: https://openlegislation.uk/outer-dowsing-offshore-wind-farm-order-2026/schedule-1/paragraph-37
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.