Group of kids playing together
Embedding change in complex systems
He makes success sound easy
Embedding change in complex systems
Couples Piggybacking in the Park
Embedding change in complex systems
Family Harvesting Vegetables From Garden at Small Home Farm
Embedding change in complex systems
Learning How to Dry Dishes
Embedding change in complex systems
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About Us

We are a small consultancy team of two independent UKPHR Registered Public Health Specialists, with additional design, analyst, and practitioner skills and capacity to support as required.

Kate Lees

FFPH, Msc, MA, RD

I’ve worked as a Consultant in Public Health and independent Public Health Specialist, across a wide range of organisations, Local Authorities, national and regional Government, the voluntary sector, academia, Criminal Justice System, and the NHS. This experience helps me understand the breadth of the health and care system and appreciate different organisational cultures, roles and contributions to health, to facilitate collaborations at strategic, community and organisational levels to achieve system wide public health action. 

I am passionate about reducing health inequalities, and firmly believe in the power of listening to and working alongside communities to truly understand and influence the factors to improve health for all.

I also love to support the development of others, including teaching, training, coaching and mentoring. I am a module lead on the University of Southampton’s MSc in Public Health, facilitator for the Faculty of public Health’s Masterclasses and moderator for UKPHR’s Public Health Practitioner Registration.


Sandra O’Hagan

FFPH, MSc

I have worked in Public Health for over 20 years, practicing at Consultant level for a significant time, following registration as a UKPHR Public Health Specialist in 2006. My experience across the NHS, local government and the voluntary sector has allowed me to continually adapt, learn and finely tune my skills across many different portfolio areas, working styles as well as solutions, that work towards improvements in health outcomes.


I love working independently in a consultancy capacity, combined with some part-time locum Consultant in Public Health work. Being able to draw on both the ‘science and art’ of my public health skill set allows me to thrive with diverse projects. I am passionate about ensuring improvement for all groups in our population and thinking differently about how to do this effectively. I like to use inclusive and creative ways to problem solve and affect change for the better.

Training and development is close to my heart. I am a facilitator for the Faculty of Public Health Masterclasses and a mentor for various public health professionals.

Our approach

As independent consultants, we work collaboratively alongside your local system, recognising complexity. We respectfully untangle issues, using professional expertise to identify pragmatic options for change, then develop sustainable plans for your workforce and partners.

We use some, or all of the steps below, dependent on your needs

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Sandra and Kate provided a first class professional service supporting South-East DsPH in crucial sector-led improvement work on suicide prevention. They brought expertise in the subject area which enabled them to rapidly develop trusted relationships across the region, and to embody the flexibility and creativity to respond to colleagues needs and suggestions to design a programme of work that delivered well beyond the original parameters. I wholeheartedly recommend them.

Director of Public Health, a South-East Local Authority
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I’ve worked with Population Health Ltd for many years, and come to rely in their expertise and commitment to public health workforce, developing programmes and innovations in London. They have carried out research, developed digital learning tools, designed and delivered learning programmes and facilitated reflective learning for a variety of stakeholder groups….. Their creative ideas and dedication to support our strategic aims are invaluable and working with them is always a pleasure.

Regional Workforce Transformation Lead: Public Health
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Kate and Sandra were flexible to our needs, provided us with expert advice, helped us develop based on our ability to respond in the future and have enabled us to collaborate on embedding a culture of prevention across a range of health, social and VCSE partners. I would highly recommend working with them again to advise, develop and/or enable a public health programme of work

Chair of County’s Suicide Prevention Partnership
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Population Health have worked with us to deliver many pieces of work. They provide our senior management team with trusted additional capacity and valuable expertise when we need it, bring a fresh perspective to issues, and work flexibly with us to achieve the outputs we need.

Director of Public Health, South-East
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ADPH NE really enjoyed working with Sandra and Kate from Population Health. They provided much needed expertise to provide an impartial and high quality session with our leads.
We particularly valued Kate and Sandra’s flexibility to meet both prior and post the session to plan and tailor the session to our group’s needs.

Health and Wellbeing Programme Manager – North East
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Sandra & Kate’s passion in their field of work, and collective years of experience helped to facilitate some excellent informative sessions for GP and Public Health trainees. Combining my own professional GP perspective with their Public Health lens meant the sessions were received very positively. It was a pleasure to work with them both.

GP Trainer, London
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Get in touch

Please contact us to discuss your needs:

information@populationhealth.co.uk