Hello. We're Nutrient Neutral…

Founded in 2021 by Sarah Belton, Nutrient Neutral have already helped numerous developers and  landowners achieve nutrient neutrality.

Our growing team of environmental consultants have experience in hydrogeology, hydrology and environmental monitoring and analysis. In particular, we draw on extensive experience in the assessment of different point and diffuse sources on river water quality.

Work with us

We are looking for enthusiastic motivated environmental professionals to join our team, and are especially keen to talk to hydrologists, ecologists, agro-ecologist, environmental consultants and anyone with an interest in nature-based solutions.

We are open to flexible and hybrid working and are happy to consider vocational experience as well as academic qualifications.
We place a high value on training and continued professional development.

Our dedicated team specialise in:

  • Nutrient neutrality assessments (NNAMS)
  • Mitigation solution development
  • Private and onsite sewage treatment solutions
  • Wetland feasibility assessments
  • Nutrient credit schemes
  • Nature-based solutions
  • Farm assessments for nutrient credit generation
  • Working with a local land manager to improve water quality
  • Lake restoration and dredging
  • Sediment trap design and construction
  • Water quality issues and improvements
  • Water quality monitoring and testing
  • Permit advice for works within watercourses

Sarah Belton
Founder and Director

Sarah has been involved with nutrient neutrality for over 4 years and founded of Nutrient Neutral in 2021. She has worked for more than fifteen years in environmental consultancy with extensive experience in surface water and groundwater management; latterly specialising in water quality and agriculture earning the title of a self-confessed ‘nutrient nerd’. She has passion for problem solving, nature-based solutions and natural capital.

Sarah has a Master’s degree in Hydrogeology, she sits on the Constructed Wetland Association committee and on the newly formed IES Water Environment & Ecosystem Services Technical Panel.

Sarah is committed to building a company with strong ethical values and a supportive environment for professional development. She is committed to investing in the next generation of professionals to give them the tools and opportunity to do better with our planet than our forebearers.

When not working can be found, commonly in wellies (even in Summer), surround by her animals, children and plants.


Phil Hayhoe
Office Manager

With over 10 years’ experience in finance and office administration behind him, Phil joined the Nutrient Neutral team in 2023. His main duties include the day-to-day running of the office, project setup and support and producing GIS maps, and putting his methodical and detail-oriented approach to good use in helping to organise and streamline the rapid expansion of the business.

In his spare time, Phil enjoys volunteering and spending time at his allotment and in his garden with his wife Rachael and their 3 dogs. He has also taken on the challenging task of learning Welsh, which is coming in very handy with the increasing number of projects taking place in Wales!


Rachel Wright
Environmental Consultant

Rachel has been with us since Autumn 2022. After almost 30 years working in education, Rachel decided it was time for a change and sought out a new challenge. As a passionate environmentalist, with an academic background in geography and newly acquired proofreading training, Nutrient Neutral proved to be the ideal place to start that second career.

Rachel undertakes nutrient assessments, report preparation and proofreads all documents.

Rachel currently works part-time; she couldn’t completely let go of the education side so she also teaches adults in community learning courses. In her free-time, Rachel enjoys walking in the Ironbridge Gorge where she lives and is learning all the skills needed to develop and maintain a garden!

Simon Longworth
Environmental Consultant

Simon very recently joined us following the completion of his Bachelor’s Degree in Environmental Sciences at Aberystwyth University. His research interests in nature-based solutions to achieving nutrient neutrality, underpinned by his desire to demonstrate the potential of re-purposing ‘waste’ products, led him to be awarded the best science dissertation within his department. He has notable experience in fieldwork operations, environmental data collection and report writing; with projects ranging from hydrogeological assessments of glacial fjords in Norway to wildlife surveying of peatland bogs in Wales. Simon’s ambitions are to continue advancing novel ideas and bespoke solutions to achieving nutrient neutrality, keeping up to date with the latest technologies through conferences and science journals.

When winding down, Simon enjoys being outdoors, either hiking around the Welsh countryside or doing a spot of landscape art; as long as he’s somewhere green and blue, he’s happy! He also helps collate freshwater quality data for the citizen science project – ‘Friends of the Upper Wye’, providing useful insight into the ecological status of the Wye catchment.

Abigail Carnegie
Environmental Consultant

Abigail joined us following A-Levels to follow a vocational route to professional qualifications. She is a hardworking valued member of the team, who is passionate about the natural environment. She has a thorough understanding of nutrient neutrality and all associated calculators and quirks of all the affected areas, she has notable experience in nutrient assessments and mitigation solution development, fieldwork and report writing. She is excited to continue her career in environmental consulting and applying her knowledge to the world of nutrient neutrality.

When unwinding at weekends Abigail enjoys walking her two Jack Russell Terriers and spending time at the family holiday lodge in North Wales.


Sam GillsonSam Gillson
Senior Environmental Consultant

Sam joined Nutrient Neutral in January 2024. His previous role was working in flood risk at the Environment Agency, where he issued Flood Risk Activity Permits, undertook public engagement with at-risk communities, and was consulted on the flood risk aspect of Planning Applications.

Sam previously worked with Sarah at an environmental consultancy where he gathered experience in groundwater and surface water management.

Sam has a Master’s Degree in Environmental Hydrogeology and is a member of CIWEM.

Sam spent six years working in Vietnam where he adopted his two poodles, Clare and Rico, who can more often than not be found in the Nutrient Neutral office.When not working, Sam can be found on his family’s farm or in the garden.

Sean Wright
Student Summer placement

Sean is currently an undergraduate at Lancaster University where he is studying MORSE, which is essentially a maths degree, with some operational research, statistics and economics involved.

Sean will be learning all the quirks of nutrient assessment has already mastered GIS drawing preparation. He is keen to enhance catchment assessments for nature-based solution through statistical analysis.

When not working or studying, Sean can usually be found in the gym.


“Sarah and her team at Nutrient Neutral are our first port of call for external consultancy assistance with dealing with issues relating to phosphate / nitrate mitigation as part of the planning application process. Their expert guidance has assisted us to move forward sites (on behalf of our clients) that would otherwise have been stagnated. We highly recommend their services, and we will continue to work alongside them moving forwards.”

James U’Dell

Brimble Lea

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