# The A122 (Lower Thames Crossing) Development Consent Order 2025, Paragraph 3: Detailed design

Extent: E+W

(1) The authorised development must be designed in detail and carried out in accordance with—
(a) the design principles document;
(b) the preliminary scheme design shown on the engineering drawings and sections; and
(c) the general arrangement drawings,
unless otherwise agreed in writing by the Secretary of State following consultation by the undertaker with the relevant planning authority and, in respect of the authorised development comprising highways other than a special road or trunk road, the relevant local highway authority on matters related to their functions, provided that the Secretary of State is satisfied that any amendments to those documents showing departures from the preliminary scheme design would not give rise to any materially new or materially different environmental effects in comparison with those reported in the environmental statement.
(2) The undertaker in relation to the detailed design of the authorised development must have regard to the amended duty to further the purpose of conserving and enhancing areas of outstanding natural beauty in section 85 (general duty of public bodies etc.) of the Countryside and Rights of Way Act 2000.
(3) Where amended details are approved by the Secretary of State under sub-paragraph (1), those details are deemed to be substituted for the corresponding engineering drawings and sections and the undertaker must make those amended details available in electronic form for inspection by members of the public.
(4) In this paragraph, “general arrangement drawings” means the general arrangement document listed in Schedule 16 (documents to be certified) and certified by the Secretary of State.

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Source: https://www.legislation.gov.uk/uksi/2025/462/schedule/2/paragraph/3 (the official version)
Page: https://openlegislation.uk/a122-lower-thames-crossing-development-consent-order-2025/schedule-2/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.