Full list of appointed consultancies and engineers, lot-by-lot breakdown, and what this framework means for the AMP8 supply chain as contracts start 1 July 2026.
Yorkshire Water's CM3842 Technical Services and Assurance Framework secures the consultancy and engineering expertise needed to plan and deliver its £7.8 billion AMP8 investment programme running from 2025 to 2030. The framework replaces previous technical services arrangements and creates a single commercial route for Yorkshire Water's engineering, asset management and commercial functions.
In plain terms: these are the firms Yorkshire Water will call on to do the thinking, the design and the independent checks on its capital programme for the next four to six years. For the supply chain, this framework sits immediately above the delivery contractors — decisions made by the firms on this list will shape the packages and programmes that flow to the wider market.
Technical services frameworks like this one define project scope, design standards and delivery routes before a single construction contract is awarded. The consultancies on this list will be writing the briefs, developing the options and setting the specifications that determine who gets work — and how much of it.
Fifteen firms were appointed across three active lots. All 15 are verified in the WIH supplier directory.
| Lot | Scope | Value | Appointed Firms |
|---|---|---|---|
| Lot 1 | Project-Level Technical Services Feasibility, options development, detailed design |
£12.7M | AECOM Arcadis Arup Binnies Egis JBA Consulting Pell Frischmann Pick Everard Sweco |
| Lot 2 | Independent Technical Assurance Third-party review and assurance |
£4M | Costain TÜV Rheinland |
| Lot 3 | Health & Safety Assurance | Cancelled | No award made |
| Lot 4 | Environmental Assurance | Cancelled | No award made |
| Lot 5 | Multi-Disciplinary Design — Complex Projects Integrated design for major capital schemes |
£13.3M | AECOM AtkinsRéalis Jacobs Mott MacDonald Arup WSP |
| Lot 6 | Strategic Solutions Partner | Cancelled | No award made |
| Lot 7 | Strategic Design Capability Sole technical design partner for the programme |
£50M | Arup Sole appointment |
All 15 firms appointed to this framework are listed in the WIH supplier directory. Search for any of them to find their profile, website and category information.
Arup appears on three of the four active lots — Lot 1 (project-level design), Lot 5 (complex multi-disciplinary design) and Lot 7 (strategic design partner, sole appointment at £50M). The Lot 7 sole appointment is the most significant single award in the framework. At £50 million, it makes Arup Yorkshire Water's strategic design partner for the programme — a position that carries significant influence over how the capital plan is shaped and sequenced.
For context, the next largest lot (Lot 5, multi-disciplinary design) is valued at £13.3 million across six firms. The Lot 7 appointment is more than three times larger, and it goes to one company.
Three lots were cancelled with no award — Lot 3 (Health & Safety Assurance), Lot 4 (Environmental Assurance) and Lot 6 (Strategic Solutions Partner). Cancellations in a procurement of this scale are not unusual — they typically reflect a decision to bring a function in-house, bundle it differently, or defer it to a later stage. They are worth noting because:
Technical services frameworks do not directly employ the construction supply chain — but they determine the shape and pace of what gets built. Here is what Tier 2 and specialist suppliers should take from this appointment:
Separately, Yorkshire Water has appointed Jacobs — also on Lot 5 here — to a £32 million AI services framework, announced 9 June 2026. Jacobs will co-develop AI and data solutions for network monitoring, leakage detection and predictive maintenance. The combination of technical design appointments and AI investment signals a Yorkshire Water AMP8 programme that will be more data-driven than any previous period.
This is not a future announcement — the framework contracts begin on 1 July 2026, three days from the date of this article. Work under these appointments is starting now. For any business in the Yorkshire Water supply chain or looking to enter it, the window for introductory conversations with these consultancies is open, and the programmes they are scoping will generate subcontract and specialist supply opportunities through to 2030 and potentially 2032.
Framework start: 1 July 2026 · Initial term end: 30 June 2030 · Maximum term (with extensions): 30 June 2032
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