Our Health Experts

Clinical Governance

Paul Nash

Paul Nash BSc ACSM – Clinical Lead and Head of Clinical Governance


As clinical lead, Paul is responsible for creating Quealth's core health journey, risk prediction algorithms and behavioural change interventions as well as all health interpretation, information and advice. He is also responsible for the clinical validation of Quealth, ensuring that all aspects of the health journey are evidence-based and optimised in partnership with leading academic institutions.

Academic and Clinical Expert Panel

Stephen Weng

Dr Stephen Weng – Health Risk Assessment


Stephen is our academic lead on the validation of the Quealth Health Risk Assessments. As an applied epidemiologist at the University of Nottingham's Division of Primary Care within the School of Medicine, Stephen is an expert in applied epidemiological methods, risk prediction modelling using large primary care databases and in complex intervention study design.

He was awarded a prestigious UK National Institutes of Health Research (NIHR) fellowship as part of the National School of Primary Care Research. He is currently harnessing the power of 'big data' patient electronic records in order to develop and translate novel risk prediction tools to support clinical decision-making in primary care.

Luis Vaz

Dr Luis Vaz – Health Risk Assessment


Luis is an Epidemiologist and Biostatistician working in the Division of Primary Care at the University of Nottingham. His current role involves researching smoking cessation in pregnancy. He has extensive knowledge of experiment design and statistical analysis and specialises in advanced statistical methods including Multi-level modelling, Structural equation modelling, Markov chain Monte Carlo and Multivariable regression techniques to analyse clinical trial, routinely collected and large clinical databases.

Luis is working with Paul Nash and Stephen Weng to develop novel risk prediction algorithms for key chronic diseases, informing individuals to take preventative measures.

Leo Pemberton

Leo Pemberton BSc(Hons) RD MBDA – Diet and Nutrition

A registered dietitian and nutritionist with experience of working within three large NHS Trusts in London. Leo also works with families, individuals and businesses to improve health and food knowledge in clinical and corporate settings, based in clinics both in London’s City and Harley Street.


An active member of the British Dietetic Association (BDA) and the Health & Care Professions Council (HCPC), Leo has worked for Diabetes UK and the British Heart Foundation in a prevention awareness role and as an ambassador. Leo has also worked with several private healthcare insurers – projects undertaken include community diabetes education, social enterprise and workplace wellbeing.

Graham Cope

Dr Graham Cope – Smoking


Graham is a medical writer, company director and an Honorary Senior Research Fellow at the University of Birmingham. He specialises in tobacco-related topics, specifically the health effects of cigarettes, electronic cigarettes and smokeless tobacco. He is the author of a book entitled ‘Smoking – what all healthcare professionals need to know’.

Graham's other writing covers cardiovascular, gastrointestinal and renal medicine. Some years ago, to improve his research findings he invented a simple and rapid test to identify and monitor smoking habits. This is now used in smoking cessation projects around the world. The high-profile nature of this work has led to numerous appearances in national and international TV, on radio and in news media.

Dale Esliger

Dr Dale Esliger – Physical Activity 

Dale’s research focuses on enhancing the accelerometry-based measurement of physical activity and sedentary behaviour. Recent incorporation of non-invasive, continuous physiological sensing into the sedentary test cases' workflows has allowed more sophisticated physical activity and sedentary behavior measurement methodologies/technologies to advance understanding of the interplay between physical activity, sedentary behaviour, and health.

Jonathan Ward

Dr Jonathan Ward – Alcohol


Dr Jonathan Ward is founder and Managing Director of Breaking Free Group, creators of a powerful digital health platform targeting addictive behaviours. He led the design and development of Breaking Free Online, its pioneering evidence-based digital treatment programme for alcohol and drug dependency. Using very robust behavioural science, this helps people overcome key barriers to treatment, including stigma, waiting lists and problems accessing services. In 2014 its specialist 'Justice' solution – developed in consultation with the Ministry of Justice to reduce substance-driven reoffending – became the world's first online healthcare intervention for offenders to be implemented in prisons.


Jonathan has an MSc in Psychology and a Doctorate in Clinical Psychology, and has published extensively in UK and US peer-reviewed journals. Previously, he practised in the National Health Service as a clinical psychologist, specialising in adult mental health.

Health content team

We’re proud of our health information, advice and coaching – it’s evidence based and highly tailored to your personal health and lifestyle. 

Our experienced team of health writers and editors are masters at creating engaging health content that’s scientifically accurate and complete but at the same time a pleasure to read.

Claire Read

Claire Read

Chris Ritchie

Chris Ritchie