Trydan Project Development Services Tender - Contract Notice

Trydan Gwyrdd Cymru
Wales
Open procedure
2 September 2025 to 1 September 2028

Professional services for two wind farm developments in South Wales, covering conceptual design through to planning consent. The work is split into four lots: Environmental Impact Assessment (EIA) and technical support, terrestrial ecology and ornithology surveys, planning strategy and submission to Planning and Environment Decisions Wales, and civil engineering/geotechnical expertise to inform infrastructure design and site investigations.

Open the official notice

Awarded value: £1.8m; As published
Published: 13 March 2025
Awarded: 1 September 2025; Mott MacDonald, LDA Design, BSG Ecology and 1 more
Contract length: 36 months; Ends 1 September 2028

What the contract covers

Services contract

Provision of professional development services for wind farm projects, including environmental impact assessments, ecological surveys, planning support, and civil engineering.

Coordinate and manage the Environmental Impact Assessment for both wind farm projects.
Deliver external-facing documentation, including the EIA Scoping Report and Environmental Statement, to support the planning application for each project.
Develop infrastructure designs for each project with Trydan and Lots 2–4, balancing environmental, planning, technical, engineering and commercial considerations, using baseline information, stakeholder engagement and best-practice methods.
Coordinate ecological and ornithological surveys for both wind farm projects.
Provide inputs to external-facing documentation, including the EIA Scoping Report and Environmental Statement, to support the planning application for each project.
Develop a site-wide Net Benefit for Biodiversity strategy for each project.
Advise on the planning strategy and deliverables for both wind farm projects.
Submit the planning application for both projects to Planning and Environment Decisions Wales on behalf of Trydan.
Deliver external-facing documentation, including the Planning Statement and Green Infrastructure Statement.
Coordinate and contribute to the determination phase of both planning applications.

Lot	Estimated value	SMEs
Environmental Impact Assessment (EIA) Support and Technical Support.	£2m	Suitable
Terrestrial Ecology and Ornithology	£900k	Suitable
Planning Support	£300k	Suitable
Civil Engineering Support	£300k	Suitable

Terms and requirements

Contract type: Services contract
Procedure: Open procedure
Initial term: 36 months
Extensions: 12 months
Longest it can run: 48 months
Contract dates: 2 September 2025 to 1 September 2028
Certifications asked for: None stated
Lots: 4
Suitable for SMEs: Yes
Suitable for charities and social enterprises: Yes
Category: Services
CPV codes: 71314200, 71314300

Services in this contract

Environmental impact assessmentMain service£95k typicalEIA coordination and technical support for two wind farms
Civil and structural engineering£60k typicalCivil engineering and geotechnical design support lot
Ecological surveys and assessment£47k typicalTerrestrial ecology and ornithology surveys lot
Planning consultancy for applications and appeals£76k typicalPlanning strategy and application submission lot

Lifecycle

Published
13 March 2025
Contract awardedto Mott MacDonald, LDA Design, BSG Ecology and 1 more
1 September 2025
Contract starts
2 September 2025
Contract ends
1 September 2028

The buyer

Trydan Gwyrdd Cymru

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The suppliers

Mott MacDonald

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LDA Design

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BSG Ecology

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and 1 more

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Cite this contract

Link: https://bidskim.com/tender/319653/trydan-project-development-services-tender-contract-notice
Buyer reference: TGCDEVMAY25
Open contracting ID: ocds-h6vhtk-04ecea
Last checked: 5 November 2026

Trydan Gwyrdd Cymru. Trydan Project Development Services Tender - Contract Notice. Contract award, 13 March 2025. BidSkim, https://bidskim.com/tender/319653/trydan-project-development-services-tender-contract-notice (accessed 5 November 2026).