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Biocensus

RSK Biocensus is the UK's largest network of ecological consultants, providing ecological and environmental services to private- and public-sector clients.

Last updated September 26, 2026

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Overview

RSK Biocensus is a market-leading ecological consultancy based throughout the United Kingdom. It operates as part of the RSK Group and is headquartered in Frodsham, United Kingdom. The firm describes itself as the largest network of ecological consultants in the UK, combining a 230-person in-house expert team with a quality-assured network of more than 700 freelance ecologists. This combination gives it unique technical capability, operational scale and geographic reach. The company offers a complete range of ecological services, survey expertise and pragmatic advice founded on expert knowledge of wildlife ecology, environmental legislation and policy. Its client base spans both the private and public sectors, and it works across various business sectors, providing consultancy and contracting support from individual developments to large-scale and Nationally Significant Infrastructure Projects (NSIP). RSK Biocensus's services include ecological assessments such as ecological mapping and GIS, options appraisals, due diligence and constraints analysis; scoping studies, preliminary ecological appraisals, ecological impact assessments and habitat regulations assessments; biodiversity net gain assessments using the Defra biodiversity metric; and sustainability evaluations such as BREEAM and CEEQUAL. It also conducts botanical and habitat surveys, including Phase 1 and 2 UK habitat classification surveys, rare plant and National Vegetation Classification (NVC) assessments, invasive non-native weed surveys and management, hedgerow surveys, river corridor and ditch surveys, and botanical monitoring. Protected species surveys and licensing cover comprehensive baseline surveys, population counts, long-term monitoring and licensing advice for species such as badgers, bats and dormice. The firm's team includes nationally recognised authorities in a range of ecological disciplines, producing industry-wide survey and mitigation guidance and serving on Chartered Institute of Ecology and Environmental Management (CIEEM) committees and steering groups, the governing board and the All-Party Parliamentary Group for Nature. Its aquatic ecologists are members of professional bodies including the Chartered Institution of Water and Environmental Management (CIWEM), the Institute of Fisheries Management (IFM) and the Freshwater Biological Association, and serve on IFM committees and steering groups. Senior members are chartered through the IFM and CIWEM. A support team of 30 administrative, financial and logistical specialists ensures that ecologists' technical knowledge and time are put to best use. The in-house project team holds memberships of CIEEM, the Association for Project Management (APM) and the Institute of Leadership and Management (ILM), with most project managers holding APM project fundamentals or project management qualifications (PFQ or PMQ), and one accredited NEC4: ECC Project Manager. RSK Biocensus's vision is to be seen as experts in the delivery of ecological consultancy services and industry leaders in conducting research. This dual goal is reflected in its guiding principles, which include integrating research into its business ambitions, continuing to develop innovative services and providing targeted marketing content while informing industry best practice.

History

Biocensus is a United Kingdom ecological consultancy headquartered in Frodsham. It operates as part of the RSK Group, a multi-disciplinary environmental, engineering and technical services group. The company is known as RSK Biocensus and describes itself as the largest network of ecological consultants in the UK. The firm has built its position around a combination of an in-house expert team and a large quality-assured network of freelance ecologists. According to its own account, it maintains a 230-person in-house expert team and a network of more than 700 freelance ecologists, which together provide technical capability, operational scale and geographic reach. This structure allows it to support clients on projects ranging from individual developments to large-scale and Nationally Significant Infrastructure Projects (NSIP). RSK Biocensus provides a complete range of ecological services, survey expertise and pragmatic advice. Its work is founded on expert knowledge of wildlife ecology, environmental legislation and policy. The company serves both private- and public-sector clients across various business sectors, offering consultancy and contracting support. Its technical specialists and data-led researchers have progressed small- and large-scale projects involving complex and sensitive programmes. The firm's vision is for RSK Biocensus to be seen as experts in the delivery of ecological consultancy services and industry leaders in conducting research. This dual goal is reflected in its guiding principles, which include integrating research into its business ambitions, continuing to develop innovative services and providing targeted marketing content while informing industry best practice. The company's team includes nationally recognised authorities in a range of ecological disciplines. These specialists produce industry-wide survey and mitigation guidance and serve on Chartered Institute of Ecology and Environmental Management (CIEEM) committees and steering groups, the governing board and the All-Party Parliamentary Group for Nature. Its aquatic ecologists are members of professional bodies including the Chartered Institution of Water and Environmental Management (CIWEM), the Institute of Fisheries Management (IFM) and the Freshwater Biological Association, and serve on IFM committees and steering groups. Senior members are chartered through the IFM and CIWEM. A support team of 30 administrative, financial and logistical specialists ensures that the ecologists' technical knowledge and time are put to best use. The central services team is divided into several strands supporting ecologists, project managers and senior management. The in-house project team holds memberships of CIEEM, the Association for Project Management (APM) and the Institute of Leadership and Management (ILM). Most project managers hold either the project fundamentals or the project management qualifications (PFQ or PMQ) from the APM, with some trained in agile methods. The firm has one accredited NEC4: ECC Project Manager, and many project managers have completed training in NEC4 contract processes and the use of tools such as Primavera P6 and MS Project. Project coordinators provide logistical and organisational support on projects of all sizes, and a digital team provides further support.

Products and positioning

Market-leading ecological consultancy and the largest network of ecological consultants in the UK.

  • Ecological assessments

    Ecological mapping and GIS, options appraisals, due diligence and constraints analysis; scoping studies, preliminary ecological appraisals, ecological impact assessments and habitat regulations assessments; biodiversity net gain assessments using the Defra biodiversity metric; sustainability evaluations such as BREEAM and CEEQUAL.

  • Botanical and habitat surveys

    Phase 1 and 2 UK habitat classification surveys, rare plant and National Vegetation Classification (NVC) assessments, invasive non-native weed surveys and management, hedgerow surveys and assessments, river corridor and ditch surveys, and botanical monitoring.

  • Protected species surveys and licensing

    Comprehensive baseline surveys, population counts, long-term monitoring and licensing advice for various protected species (badgers, bats, dormice, etc.).

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