IAPSC - Key Persons


Alan Leonard

Alan Leonard has over twenty-five years' experience in environmental consultancy and provides support and guidance for industry and regulators. He has been involved in the measurement and optimisation of emissions from a wide range of stationary sources. As a consequence has developed a technical knowledge of measurement procedures and of processes. He has particular experience in characterising emissions and has provided consultancy on combustion emissions and emission monitoring to UK Government, Industry and overseas clients. In addition his knowledge includes the associated regulation used to regulate these processes. Also he has been involved in producing guidance documents and training for the United Kingdom Environment Agency and a number of private sector operators.

Charlotte Day

Job Titles:
  • Consultant
Charlotte is a Consultant in the Environmental Evidence and Data Practice, specialising in dispersion modelling studies on emissions to air from road and industrial sources. These studies employ the use of RapidAIR to predict air quality impacts on human health and habitat sites, and are often submitted in support of policy decision documents for Local Authorities.Charlotte is experienced in the preparation of Low Emissions Strategies, Clean Air Zones and Zero Emission Zones for city authorities, including contributing to stakeholder consultation events designed to identify opportunities for low emission transport measures and facilitate action planning. Charlotte is experienced in assessing the air quality impacts of road sources on protected habitat sites, having completed numerous air quality Habitats Regulations Assessments (HRAs). Charlotte regularly leads stakeholder consultation with the client and Natural England as part of the HRA process. Charlotte is currently helping to deliver an Air Quality Actions Feasibility Study for Buckinghamshire Council, developing and testing packages of air quality measures to reduce emissions of nitrogen dioxide in the Iver area and wider South Buckinghamshire district.Charlotte is a trainer on Ricardo Energy & Environment's accredited EMAQ+ programme, helping to deliver webinars and live seminars to local authorities on a range of subjects including HRAs, and methodologies for the assessment of industrial emission sources. Charlotte joined the Environmental Evidence and Data department in November 2018 after completing an integrated Masters in Chemistry from the University of York. During her degree, Charlotte specialised in Chemistry, Resources and the Environment, including a focus on atmospheric chemistry. The final year of Charlotte's degree was spent on a research placement at Victoria University of Wellington. Prior to joining Ricardo, Charlotte worked in the Feed-in Tariff department for Ecotricity.

Chris Thorpe

Job Titles:
  • Project Manager
  • Senior Consultant
Chris is a Senior Consultant and Project Manager within the Environmental Evidence and Data Practice, specialising in the Monitoring, Reporting and Verification (MRV) of mitigation policy, greenhouse gas (GHG) inventories and climate resiliency. Chris has experience working with sub-national governments (e.g. city and state/regional) to compile a GHG inventory, develop a climate action plan and assess climate resilience. Amongst others, he is currently managing a 3 year project to deliver capacity building support for GHG inventory compilation and mitigation policy tracking to 7 sub-national governments in low and middle income countries.Prior to joining Ricardo, Chris worked for 4 years at the Carbon Disclosure Project (CDP), founding their states and regions reporting programme, and prior to this, worked for the European Parliament's Science and Technology Options Assessment Unit, Greenpeace, and New Zealand's Green Party.

Colin Cobbing

Job Titles:
  • Member of the Judith Nathanail - Contaminated Land Management Team
  • Chartered Fellow of the Chartered Institute of Environmental Health
Colin is a Chartered Fellow of the Chartered Institute of Environmental Health: Fellow of Institute of Acoustics; and an external examiner for the IOA

David Hector

Job Titles:
  • Consultant
David Hector is a Consultant within the Air Quality team based in Ricardo-AEA's Glasgow office, North Ayrshire. He has over seven years' experience in air quality monitoring and assessment and his particular area of expertise lies in automated air quality monitoring networks and the quality assurance/quality control and management of air quality monitoring data. David also has experience in using ADMS, ADMS Roads, ArcGIS and other tools for air quality dispersion studies. Prior to working for AEA, David worked for 2 years in the Waste sector covering pollution control and compliance for active and inactive landfill sites. This included gas migration, surface and groundwater pollution, and soil contamination. David holds a B(Sc) Honours degree in Environmental management and Technology and has been a full member of the Institute of Institute of Environmental Sciences for 3 years.

Dr Beth Conlan

Job Titles:
  • Member of the Judith Nathanail - Contaminated Land Management Team
  • Technical Director for the Air Quality Modelling, Mapping and Assessment
Dr Beth Conlan is the Technical Director for the Air Quality Modelling, Mapping and Assessment team at Ricardo Energy & Environment, leading a team of 30 consultants. Beth has been supporting Local Authorities since 1995 on Local Air Quality Management and has been involved in, and managed, over 300 review and assessments for local authorities, some of which have been promoted as good examples by Defra. She has assisted Defra redraft each Local Air Quality Management Technical Guidance note series. She has been instrumental in the delivery of the national air quality plan and local action plans working with stakeholders from transport and health disciplines in the implementation of measures. Beth has supported the European Commission for over 10 years working on time extension notification and infringement technical reviews and more widely in the review of the Air Quality Directive in 2013. She is the Framework manager for services supporting the evaluation, implementation and further development of air quality policies across Europe. Since 1998 Beth has been a trainer of air quality management to local authorities as part of the Chartered Institute of Environmental Health EMAQ training programme which is endorsed by the Institute of Air Quality Management. Beth is a member of UK Government expert Committee on the Medical Effects of Air Pollution, a global leading authority on impact of air pollution on public health.

Dr Guy Hitchcock

Dr Guy Hitchcock has over 20 years' experience of research and consulting on the environmental impacts of transport. He has worked in both consultancy and academia including roles as the head of the Centre Energy and the Environment at the University of Exeter, a Director of his own consultancy company, Sustainable Transport Solutions Ltd, and running the Bristol office of Transport and Travel Research Ltd. Guy has worked for a wide range of clients in both the public and private sector including UK Government departments, the European Commission, Heathrow Airport Ltd, and a wide range of local authorities.

Ella Wingard

Job Titles:
  • Air Quality Analyst Consultant
Ella Wingard is an Air Quality Analyst Consultant working in the Evidence & Policy team, specialising in air quality policy, management, and analysis. Ella provides technical support in stakeholder consultations and capacity building workshops, as well as analysing data to develop air quality policy recommendations. Ella has a First-Class Honours in Environmental Science from the University of Leeds with a study year abroad spent at Queensland University Technology in Brisbane, Australia. Her final year research project involved analysing the UKESM1 climate model output with Python to investigate the historical and projected relationship between the stratospheric polar vortex and Australian climate variability.

Ian Marriner

Job Titles:
  • Member of the Judith Nathanail - Contaminated Land Management Team
  • Director of Price Marriner & Associates Limited
Ian Marriner is a Director of Price Marriner & Associates Limited, a consultancy specialising in regulatory compliance across a range of disciplines. Ian worked as an Environmental Health Practitioner in local government for over 20 years and had provided consultancy services in the private sector for the last 13 years. Ian is legally qualified and specialises in investigation and enforcement skills training within regulatory enforcement.

Jo Green

Job Titles:
  • Principal Consultant
Jo Green is a Principal Consultant with 11 years experience in the air quality field. Jo has extensive knowledge of a wide range of ambient air quality monitoring techniques and designing suitable monitoring programmes as well as the subsequent data ratification, data interpretation and reporting. Jo is an experienced project manager and has managed a wide range of air quality projects for key UK and international Government departments, local authorities and private industry. She is currently project manager for the Kent and Medway Air Quality Monitoring Network and numerous Local Authority air quality monitoring contracts. Other significant projects Jo has managed include the development of a methodology to summarise air pollution effects on ecosystems; a long-term trunk road air quality monitoring network for the UK Highways Agency; a pilot study looking at the development of a Geographically Specific Emissions Inventory for the EEA; and an investigation into the impact of motorway Active Traffic Management on emissions and air quality. She also is responsible for one of the key projects which makes up the Environment Agency's new national air quality emergency response service.

John Shelton

John Shelton is an experienced acoustician specialising in the instrumentation. John is the Managing Director of AcSoft having set up the business in 1994 following experience working developing loudspeakers at Goodmans, and later working with Bruel & Kjaer UK as an area sales engineer.John has specialisms in the measurement of sound intensity and source location techniques, as well as managing technical sales of instrumentation across the UK. John spent two years at Brüel & Kjær in Denmark gaining experience in VXI-based virtual instrumentation and development of software measurement solutions, ultimately taking responsibility for worldwide sales & marketing. John is an active member of the Institute of Acoustics and sits on several national committees and working groups on measurement & instrumentation is the Chair of the IOA Measurement and instrumentation group.

John Watterson

Job Titles:
  • Project Manager of the UK GHG Emissions Inventory
John Watterson is the project manager of the UK GHG Emissions Inventory compiled on behalf of Defra. He has experience of the estimation of many of the main GHG emissions, for example, from combustion, industrial processes, waste disposal and an appreciation of emissions and sinks from agriculture and land use change. He is familiar with the international greenhouse gas reporting requirements, for example, the CRF tables and the National Inventory Report. John has been selected to participate in the IPCC scoping meeting for the revision of the "Revised 1996 IPCC Guidelines for National Greenhouse Gas inventories". John prepared a paper for presentation at the Workshop on Energy Balances and Energy related Greenhouse Gas Emission Inventories (Working Group I of the EU Greenhouse Gas Monitoring Mechanism Committee, 24 to 25 June 2003 EEA, Copenhagen). John has assisted with the development of the National Atmospheric Emissions Inventory (NAEI) over a period of four years, and prepared the UK's first base cation inventory and developed a speciated mercury inventory. Prior to this John spent over 5 years working on Local Authority Review and Assessment of Air quality and has been a trainer of air quality management to local authorities as part of the EMAQ training programme for a number of years.

Judith Nathanail

Job Titles:
  • Director With Land Quality Management Ltd
Judith Nathanail is a Director with Land Quality Management Ltd and has over 25 years' experience in the field of contaminated land management. She has degrees in Geography and Geology from London University and an MSc in Engineering Geology from Imperial College London. She has worked for Wimpey Laboratories, Wimpey Environmental and Delta Simons and joined LQM in 1999. Judith has carried out and project managed numerous phase 1 and phase 2 risk assessments and has extensive field experience in most aspects of site investigation. She has been involved in a range of remediation projects including air sparging and bioremediation. Judith is a co-author of the LQM/CIEH Suitable 4 Use Levels and has worked on various research projects including NanoRem (a EU project on NanoRemediation) and D4S (an innovate UK funded project on renewable energy.

Keith Vincent

Job Titles:
  • Senior Consultant
Keith Vincent is a Senior Consultant with 30 years' experience in air quality monitoring and policy assessment. Throughout this time he has been involved with developing air quality modelling tools, reporting monitoring data and assessing the impact of measures and regulations on ambient air quality. He also works in local air quality management developing air quality action plans and assessing the impact of road traffic emissions. and took a leading role in ensuring that reported monitoring and metadata from all UK air quality monitoring networks meet the required standard. Keith has been an EMAQ trainer for Local Air Quality Management since 2017

Liz Smith

Job Titles:
  • Member of the Judith Nathanail - Contaminated Land Management Team
Liz Smith has worked in Community Safety and Housing for 23 years with the last 15 of those years being at Stockport Homes in Greater Manchester. Liz is committed to the continuous improvement of community safety services in Stockport and has been responsible for the development and implementation of a range of strategies, policies and procedures relating to crime and ASB, this has recently included the transfer of private sector casework from the Council and providing a tenure neutral ASB service across Stockport. Liz is passionate about customer engagement and working with residents to help shape services and improving the life chances of vulnerable victims and perpetrators to ensure that ASB is successfully tackled and not tolerated.

Mark Attree

Job Titles:
  • Senior Consultant at Ricardo Energy & Environment
Mark Attree is a Senior Consultant at Ricardo Energy & Environment working in the Environmental Evidence & Data Practice. His areas of expertise include atmospheric physics, dispersion model sensitivity, and dispersion in complex urban environments. Mark provides consultancy services for a range of public and private sector clients, including emissions inventory compilation, local modelling for planning and permitting, and large-scale urban and regional modelling to support air quality action planning. He also has extensive experience providing technical support and software training for clients in the UK and abroad.

Mark Broomfield

Mark Broomfield is an air quality, odour and health impacts specialist with a BA in chemistry from the University of Cambridge, and a PhD in atmospheric chemistry. He has worked in these areas since 1992, both within the consultancy sector and as an industry specialist at ICI. He provides technical, strategic and research support to industry and regulatory bodies. He has contributed to over 250 industrial permitting applications and follow-on support projects. He also works closely with clients to deliver obligations under the land-use planning and local air quality management frameworks. Mark also contributes to seminars and conferences on air quality, health and waste-related topics - for example, as an invited speaker and panel member at a European Commission expert workshop on geological risks of unconventional gas (autumn 2012). He is a member of the UK Natural Environment Research Council Peer Review College and industrial supervisor of a PhD student at the University of Birmingham.

Mark Roberts

Job Titles:
  • Member of the Judith Nathanail - Contaminated Land Management Team
Mark started working for Ricardo in February 2023, prior to this he worked for the Environment Agency for 22 years. He spent 15 years carrying out compliance work at various permitted waste sites and regulated facilities. During this he gained a range of experience in the planning and delivery of inspections and audits at waste facilities. He has developed a wide range and depth of understanding of site management plans and environmental management systems. He is experienced in reviewing and auditing written management systems, identifying environmental risks, and resolving complex compliance issues. Mark worked closely with sites and their operators to help improve environmental performance. He also worked with EA partners such as the Fire Service and Local Authority's tackling complex and high-risk sites, to resolve compliance issues and design improvement plans. This included creating written site risk assessments, fire and accident management plans and off-site receptor plans. Mark is also experienced in preventing and disrupting waste crime and tackling illegal waste sites.

Michael Campbell

Job Titles:
  • Member of the Judith Nathanail - Contaminated Land Management Team
  • Principal Consultant
  • Transport
Michael is a Principal Consultant within the sustainable transport team at Ricardo Energy & Environment, leading and advising on projects for public and private sector customers. Specialist expertise includes the decarbonisation of transport across all sectors, electrification of vehicles and fleets, alternative and renewable fuels, infrastructure requirements, technology appraisal, current and future transport policy, and regulatory compliance. Michael is a chartered engineer with over 20 years' previous experience in the Automotive and Industrial engineering consultancy of Ricardo in powertrain development, emissions compliance, and CO2 reduction, leading research and development projects for a wide range of automotive and non-automotive clients. This background provides deep understanding of the technical challenges and opportunities for decarbonising vehicles, and of the practicalities of evaluating vehicle performance. Through participation in Zemo partnership and SMMT (industry) working groups, as well as Ricardo projects for a range of public and private sector clients, he keeps up to date with policy and market developments.

Nigel Gibson

Nigel Gibson has over twenty years' experience in the assessment and control of air pollution from industrial processes, and is Ricardo's foremost expert in the area of odour assessment and control. He has wide experience in the measurement and control of odour from a wide range of agricultural, industrial, and waste sectors, working both for Local Authorities and process operators. He is deeply involved in developing guidance on odour, where he has assisted DEFRA in their preparation of odour control guidance documents for commercial kitchens, nuisance control of bonfires and composting. He has also assisted SNIFFER develop their guidance for odour control from animal rendering and SEPA . He has prepared guidance for SEPA on odour control and health aspects of odour, and has recently prepared guidance on BPM for odour control from waste water treatment in Scotland. Nigel represented the UK on several CEN Working Groups concerned with producing harmonised emission monitoring methods to serve EU Directives. He has served on the Working Groups for odour, TOC and instrument certification etc. He is the technical assessor of the guidance on emission monitoring prepared for the CIEH by Ricardo and is the principal author of several CIEH Protocols, including that relating to animal and vegetable processing sectors.

Oliver Marshall

Job Titles:
  • Air Quality Analyst Consultant
Oliver is an Air Quality Analyst Consultant in the Evidence & Policy team, specialising in air quality dispersion modelling. Oliver has worked on studies employing the use of RapidAIR for road traffic scenario testing. He joined the Evidence & Policy team after completing his Master of Research in Climate and Atmospheric Science and Bachelors in Environmental Science at the University of Leeds. Oliver's research project presented the climatology of extreme surface wind speeds over Europe from 1950 - 2014 using a multi-model ensemble.

Patrick Harland

Job Titles:
  • Air Quality Analyst Consultant
Patrick Harland is an Air Quality Analyst Consultant in the Evidence & Policy Team, specialising in air quality modelling and analysis. Patrick provides analysis and field work support for odour management and nuisance complaints. Patrick joined the Evidence & Policy team following a Masters in Environmental Engineering and a Bachelors in Medicinal Chemistry from Newcastle University. During the masters Patrick conducted a project examining the impact of large scale events on air quality in Newcastle upon Tyne, examining a wide range of pollutants over an 18 month period. Prior to joining Ricardo Patrick undertook a PGCE in Secondary Mathematics and holds qualified teacher status.

Robert Benney

Job Titles:
  • Environmental Consultant
Robert Benney is an Environmental Consultant within the Air Quality and Environment Practice specialising in the impact assessment of Road, industrial and waste management facilities. Robert provides air dispersion modelling and human health impact assessments for a range of private and public sector clients, for facilities including mixed-use developments, large road infrastructure, large scale waste infrastructure projects, landfill sites, agricultural holdings, organic waste treatment sites, and onshore oil and gas facilities. Robert is a core member of Ricardo's feasibility studies team, developing the evidence base for measures to achieve the UK's air quality action plan and review team supporting Local authorities assess air quality assessments in support of planning applications.

Robert Stewart

Robert Stewart has over thirty years practical experience of industrial emission measurement and control and he provides IPPC permitting support and guidance for industry and regulators. His clients have included: the Environment Agency, SEPA, Local Authorities, UK Central Government, the European Commission and Industry. His specialist knowledge spans the range of processes covered by LAIPPC and LAPPC under the provisions of the Environmental Permitting (England & Wales) Regulations. Examples of his work include: advising the European Commission on modifications to: the IPPC Directive, solvents, waste incineration and related Directives and extending the IPPC directive to include 20-50MWth energy installations. Robert has also provided support to the Scottish Executive, London Councils and University of Aberdeen on potential air quality impacts of increased biomass use for heating. Robert is a technical consultant to the UK National Atmospheric Emission Inventory on the revision of pollutant emission factors for industrial and other activities particularly for combustion processes. He assisted with the revision of the UNECE guidebook on emission inventories and projections to provide emission factors for industrial and combustion sources and, to align the UNECE guidebook with IPCC guidance on greenhouse gas inventories. He has reviewed national emission inventories and emission projections for compliance with the National Emission Ceilings Directive. He has advised Defra on technical aspects of the Clean Air Act, Ecodesign Regulations and the Medium Combustion Plant Directive. Robert has been a trainer on the EMAQ training programme for over ten years.

Rohan Patel

Job Titles:
  • Consultant in the Modelling and Assessments Team at Ricardo Energy & Environment
Rohan is a Consultant in the Modelling and Assessments team at Ricardo Energy & Environment. He has over two years of experience in air quality consultancy, having been employed at Cambridge Environmental Research Consultants (CERC) prior to Ricardo. During his time at CERC he gained experience and in-depth knowledge of setting up air dispersion models for complex small and large urban areas, as well as industrial applications. Projects he has undertaken vary from local council, international, research and model development projects giving him a wide range of experience in the air dispersion modelling industry. Problem-solving skills in the industry have been developed through providing advice and technical support to dispersion model users whilst working on CERC's helpdesk. Rohan has also gained experience in carrying out training courses in the use of ADMS for a range of clients across the UK.

Stephen Stratton

Job Titles:
  • Consultant
Stephen Stratton is a Consultant within the Air Quality team based in Ricardo-AEA's Glasgow office, North Ayrshire. He has over seven years' experience in air quality monitoring and assessment and his particular area of expertise lies in the quality assurance/quality control and management of air quality monitoring networks and data. He is also experienced in using ADMS, ADMS Roads, ArcGIS and other tools for air quality dispersion studies. Stephen holds an Honours degree in Physics and is a member of both the Institute of Air Quality Management and the Institute of Environmental Sciences.

Tim Glews

Tim Glews has achieved Chartered Environmental Health Practitioner Status and is the Public Protection Manager, responsible for Environmental Protection and other services at Dudley MBC. He has over 37 years' experience in Environmental Health and over 30 years experience of regulating industrial processes, including some of the more complex A2 and part B installations. Tim has also managed his own consultancy business specialising in education and training since 1986. He is also the Chairman and Treasurer of Midland Joint Advisory Council for Environmental Protection (MJAC), a pollution group advising Local authorities, Universities, PHE & The Environment Agency within the Greater Midland Region. Tim represents MJAC & the West Midlands Metropolitan Borough Councils on national technical groups for part A & Part B activities & on air quality, reporting to Defra on policy and legislation implementation. Tim is also the owner & lead facilitator for the LGA National Industrial Pollution Knowledge Hub. Tim has been involved with numerous SG and PG guidance note reviews and is still listed as "expert" for three industrial sectors by CIEH. Tim has extensive experience in presenting, lecturing throughout the UK & Europe for the past 30 years and is an established visiting lecturer at both the universities of Birmingham and Wolverhampton. Tim is a practicing industrial regulator and experienced manager, evolving policy and practice in all issues of Pollution Prevention and Control. He has undertaken successful enforcement action including prosecuting ‘not guilty' pleas at Magistrates court, establishing precedent at high court, managing cases at coroners court and pursuing Environmental Protection and planning appeals through the public inquiry route.

Tom Buckland

Job Titles:
  • Associate Director
  • Project Manager
Tom Buckland is an Associate Director, Project Manager and Team Leader working in the Environmental Evidence & Data Practice. Tom has an extensive track record of successful projects related to air quality and climate change. Tom specialises in emissions arising from the transport, industry and waste management sectors and is a member of Ricardo Energy & Environment's inventory team responsible for the provision of the UK's National Atmospheric Emissions Inventory (NAEI). Tom is experienced in the preparation of Low Emission Strategies and Climate Action Plans for cities in the UK and overseas. Tom regularly leads stakeholder consultation events and capacity building workshops designed to identify opportunities for low emission measures and policies.

Tom Nokes

Job Titles:
  • Member of the Judith Nathanail - Contaminated Land Management Team
  • Transport
Tom is a Senior Consultant in the Sustainable Transport team. He has over six years' experience as a technical consultant and project manager working on projects addressing climate change and environmental issues, with a focus on sustainable transport and energy. He specialises in corporate and public sector transport decarbonisation, with expert understanding of sustainable transport technologies (i.e. electric, connected, shared), urban mobility, and fleet decarbonisation. As the Net Zero transport lead, Tom frequently provides inputs to Net Zero and sustainability themed strategies. He has held technical lead roles in several studies for both public and private sector clients, taking responsibility for analytical method development, data collection and statistical model delivery in Excel and Python. He is skilled in leading challenging stakeholder engagement activities, with his work on European Commission projects demonstrating an ability to manage and balance the views of different stakeholder groups. Tom's project experience has also given him an appreciation of financial and economic themes, allowing him to support projects across the value chain from the evidence base through to implementation. He recently achieved a certification for Sustainable Finance from the University of Cambridge.

Tony Higgins

Job Titles:
  • Director of Enviroconsult Limited
Tony Higgins is a Director of Enviroconsult Limited specialising in environmental and acoustic consultancy services. Tony has worked in local government regulation for over 25 years, principally in environmental protection, but also as an independent environmental consultant for the last 15 years. Tony worked as a regulator, and is familiar with evidence gathering, enforcement, and legal processes across a number of regulatory regimes. His technical expertise covers a broad range of environmental disciplines including, environmental permitting, waste, noise and nuisance investigation, environmental planning, health and safety, and licensing. Tony is a member of the Institute of Acoustics, Measurement and Instrumentation technical group. Tony's recent work involves considering planning applications for the redevelopment of Telford Town Centre, carrying out due diligence assessments for a tyre pyrolysis plant, regulation of major industrial processes such as large foundries and galvanising plants and wood treatment plant, and helping devise multi-agency response to noise problems from Ironbridge Power station. Tony has organised BS4142:2014 training sessions for the Institute of Acoustics. Additionally, Tony has provided expert witness advice for councils in both inquiry and court, and has sat on the review of PG and SG notes for solvents, metals, minerals and combustion industry sectors. Tony also attended the Industrial Pollution Control Local Authority Group and Industry Forum in relation to Industrial pollution control policy.