Key Personnel


Geoffrey Walton (PhD, CEng, FIMMM, FIQ, FGS)

Chairman and Managing Director

Geoffrey Walton has a PhD in mining engineering from Nottingham University and was visiting professor of mining at Leeds University for 20 years from 1995. He worked for the NCB Opencast Executive as Headquarters Geotechnical Engineer, and in 1973 set up GWP a mine and quarry design consultancy. In 2004 he established DustScan Ltd - a spin-off company from Leeds University which in 2016 became DustScanAQ reflecting the growing importance of both dust and air quality in the firm’s work. He oversees a research based business with academia and professional institutions to better serve industry.

Sue Radbourne

Director of Finance and Administration

Sue Radbourne has extensive experience in managing the day to day functions of SMEs. She joined DustScan Ltd in 2005 and is responsible for the internal administration and the organisation of financial and personnel matters. She is the internal financial controller having contacts with all clients, customers and suppliers.

Ayan Chakravartty (BEng, MSc, MPhil, CSci, MIEnvSc, MIAQM, MCIHT)

Principal Air Quality/Transport Consultant

Ayan Chakravartty joined DustScan in 2016 as Principal Air Quality Consultant. He has experience in the field of environmental research and assessment within regulatory, academia and consultancy sectors. Ayan has an honours degree in Civil Engineering (Specialising in Transport and Geotechnical Engineering), and higher degrees in Transport Planning and Air Pollution; currently he is completing a PhD on air pollution health impacts at Newcastle University. His primary interests lie in transport planning and air quality impacts, but he also works on greenhouse gas, carbon and odour assessments.

Oliver Puddle (BSc, CSci, MIEnvSc, MIAQM, MIQ, AFOH)

Senior Environmental Scientist

Oliver Puddle joined DustScan in 2006; he has an honours degree in environmental science from Portsmouth University and is an active member of the Institute of Air Quality Management and the British Occupational Hygiene Society. Oliver’s interests and expertise are in the monitoring, assessment and characterisation of fine particulate matter in ambient and workplace atmospheres. He undertakes workplace and occupational dust exposure surveys for COSHH assessments with associated reports. Oliver also organises much of the laboratory, site practice and dust monitoring activities.

John Bruce (BSc, MIAQM, AMIEnvSc)

Environmental Scientist and Modeller

John Bruce joined DustScan in 2012; he holds a first class honours degree in environmental forensics and is completing a PhD on dust modelling at Portsmouth University. He works with the consultancy team on both dust and air quality matters and on related R&D and IT matters including empirical modelling techniques and invesitgating emission factors. John has published widely on dust monitoring and modelling.

Andrew Green (BSc, AMIEnvSc, AMIAQM, AFOH, AssocIScT)

Environmental Scientist

Andrew Green joined DustScan in 2014; he holds a first class honours degree in Environmental Science from Portsmouth University. Andrew currently undertakes a range of detailed dust sample analyses including Scanning Electron Microscopy and dust provenance detection methods. He regularly assists the firm’s consultancy team.

Daniel Quinn (BA, MSc, AMIEnvSc, AMIAQM)

Environmental Geoscientist

Daniel Green joined the firm in June 2015 with a BA in Earth Sciences from Trinity College Dublin and an MSc in Quaternary Sciences from Royal Holloway University of London. He works on the analysis of directional and depositional dust samples, microscopy and also undertakes detailed site assessments and provides support with consultancy work.

Eleanor Winning (BSc, MSc)

Graduate Air Quality Scientist

Eleanor joined the firm in September 2017 after completing her MSc in Environmental Engineering at Newcastle University; she also has a first class honours degree in Geography. Eleanor is currently learning about all aspects of the business, assisting with routine analytical work and working closely with Ayan to quickly develop her knowledge of air quality assessments and related projects.

Nassim Azzout

Technical Officer (intern)

Nassim is a Geography student of Bournemouth University and joined the firm in August 2017 on a 12-month employment placement. Nassim is helping process incoming samples and assisting the firms scientists with a wide range of analytical work.

Tracey Volley

Technical Assistant

Tracey is responsible for the database cataloguing of incoming client samples, basic sample processing and the smooth operation of our daily courier arrangements.

Hugh Datson (PhD, CSci, MIEnvSc, MIAQM, FIQ, FGS)

Retained Consultant

Hugh Datson has a PhD from Leeds University’s School of Process, Environmental and Materials Engineering and a first class honours degree in geology and environmental sciences from Oxford Brookes University. He joined DustScan Ltd in 2004 and since then has been concerned with the characterisation of collected dust including optical microscopy and ICP-MS and with dust monitoring methods used in Dust Management Schemes and Dust Action Plans. Hugh has worked on various Good Practice and Technical Guidance Notes, on Air Quality Assessments and on their support in the planning process.

Dr Mike Fowler (MSc, PhD, CGeol, FGS, FRSC)

Retained Consultant

Mike Fowler is a Reader at Portsmouth University and has worked with DustScan since 2004. He is the analytical consultant to the firm being a senior geochemical specialist in geology, environmental sciences and environmental forensics and has played a significant role in establishing a geochemical basis to DustScan’s dust characterisation and research activities including PhD support.

DustScanAQ would be pleased to hear from you if you would like to discuss your requirements and how we can help you with your project, please contact us on 01608 810110 or email .