CEFAS25-97 Request for Quotation for the provision of Hydrographic Expertise

Cefas
East of England
Open procedure
14 January 2026 to 31 December 2028

Technical review and quality assurance of third-party bathymetric multibeam echosounder survey data for nuclear new build power station sites. Work involves monitoring geomorphological changes, seabed alterations in dredging areas, and infrastructure scour. Services are provided on an ongoing basis with quarterly survey reviews expected for Sizewell C and ad-hoc support for Hinkley Point C.

Open the official notice

Awarded value: £100k; As published
Published: 7 November 2025
Awarded: 14 January 2026; Intertek, HR Wallingford and Hydenlyne Limited
Contract length: 36 months; Ends 31 December 2028

What the contract covers

Core contract with up to two additional call-off contracts

Provision of specialist hydrographic survey data review, quality assurance, and technical reporting services for marine environmental monitoring programmes.

Provide specialist technical review and quality assurance of nearshore hydrographic survey data from third-party surveys
Manage, review, analyse and report on third-party hydrographic surveys for regulatory marine environmental monitoring
Review bathymetric multibeam echosounder surveys examining geomorphological change of nearshore bars and sandbanks, including validation of remote x-band radar measurements
Review bathymetric multibeam echosounder surveys examining seabed change in dredging areas and dredge disposal sites
Review bathymetric multibeam echosounder surveys examining scour around seabed infrastructure

Terms and requirements

Contract type: Core contract with up to two additional call-off contracts
Procedure: Open procedure
Initial term: 36 months
Extensions: 12 months + 12 months
Longest it can run: 60 months
Contract dates: 14 January 2026 to 31 December 2028
Certifications asked for: None stated
Lots: 1
Suitable for SMEs: Yes
Suitable for charities and social enterprises: Yes
Category: Services
CPV codes: 71621000

Services in this contract

Hydrographic and bathymetric surveysMain service£75k typicalHydrographic expertise reviewing nearshore survey data for nuclear marine monitoring

Lifecycle

Published
7 November 2025
Contract awardedto Intertek, HR Wallingford and Hydenlyne Limited
14 January 2026
Contract starts
14 January 2026
Contract ends
31 December 2028

The buyer

Cefas

Type: Locked
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Recorded value: Locked
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Bathymetric survey contracts, 24 months: Locked

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The suppliers

Intertek

Contracts won, 24 months: Locked
Value won, 24 months: Locked

HR Wallingford

Contracts won, 24 months: Locked
Value won, 24 months: Locked

Hydenlyne Limited

Contracts won, 24 months: Locked

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Cite this contract

Link: https://bidskim.com/tender/333529/cefas25-97-request-for-quotation-for-the-provision-of-hydrographic-expertise
Buyer reference: CEFAS25-97
Open contracting ID: ocds-h6vhtk-05dcd8
Last checked: 5 November 2026

Cefas. CEFAS25-97 Request for Quotation for the provision of Hydrographic Expertise. Contract award, 7 November 2025. BidSkim, https://bidskim.com/tender/333529/cefas25-97-request-for-quotation-for-the-provision-of-hydrographic-expertise (accessed 5 November 2026).