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    ContractsDesign and Integration Partner for Only Rainwater into Windermere Programme
    Open tender

    Design and Integration Partner for Only Rainwater into Windermere Programme

    Contract value
    £600m
    Published 21 Oct 2026

    United Utilities is seeking a Design and Integration Partner to lead the multi-workstream Only Rainwater into Windermere programme, a major infrastructure initiative to eliminate wastewater discharges and restore England's cleanest lake, with pre-delivery phase value of £60-100m over 4 years and potential delivery phase support up to £500m.

    🇬🇧United Kingdom· North WestPublished 21 Oct 2026· TodayviaFind a Tender
    Contract value
    £600m
    Published 21 Oct 2026

    Decision brief

    4 fields
    • Contract value
      £600,000,000indicative
      Pounds sterling
    • Closing date
      Rolling
      No closing date published
    • Sector
      Engineering
      Browse related listings
    • Location
      🇬🇧United Kingdom
      North West

    Lifecycle

    Open

    Open tender — no closing date published. Opened today.

    21 October 2026
    Open tender · no closing date published

    Brief

    United Utilities Water Ltd seeks a Design and Integration Partner (D&IP) to lead the Only Rainwater into Windermere (ORiW) programme, a major infrastructure project aimed at making Windermere the cleanest lake in England by eliminating wastewater discharges and managing surface water runoff. The ORiW programme comprises multiple workstreams including First Time Sewerage connections, First Time Treatment facilities, nature-based surface water management, tunnel and rising main construction, and wastewater treatment works upgrades. The D&IP will be responsible for developing outline designs, managing environmental impact assessments, leading planning and Development Consent Order (DCO) submissions for this Nationally Significant Infrastructure Project (NSIP), coordinating stakeholder engagement, and ensuring whole-system integration across all programme elements. The role encompasses feasibility studies, constructability assessments, ground investigation coordination, and Early Contractor Involvement activities to obtain necessary approvals and consents. The D&IP may also provide ongoing support during the delivery phase as a system integrator and/or detailed design partner, depending on UU's final delivery model. This is a long-term engagement spanning multiple phases, with anticipated pre-delivery phase value of £60-100m over approximately 4 years, and potential additional delivery phase support valued at £100-500m over up to 9 years. This notice is market engagement activity and does not constitute a formal call for competition.

    Track record

    5 awards · 5 winners
    Open panel

    Mostly framework call-offs rather than head-to-head competition.

    In engineering, UNITED UTILITIES WATER LIMITED has awarded 5 contracts to 5 suppliers.

    Who wins here
    1. NSI Water and Wastewater Solutions Ltd1× · 20%
    2. AQUALOGIC (WC) LTD1× · 20%
    3. Amelio Utilities Ltd1× · 20%
    4. Element Materials Technology Environmental UK Ltd1× · 20%
    5. Oss Enviro (Global) Ltd1× · 20%

    Across engineering, the most active winners are AECOM LTD, WSP UK LIMITED, OVE ARUP PARTNERS LIMITED — the field to beat, or your route in as a partner.

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    Take action
    View tender on sourceFind a Tender

    Full notice and submission process on the publisher's site

    Publisher
    UK Cabinet Office
    Licence
    OGL v3.0
    Source
    find-tender.service.gov.uk
    Record ID
    ocds-h6vhtk-078c58

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    5 awards · 5 firms

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    UU
    Buyer
    UNITED UTILITIES WATER LIMITED
    Sector
    Engineering