Our people

Our Trustees


Our team

We pride ourselves on being a flexible, productive and well-connected organisation. Our multinational team are experts in their field. Deeply embedded in work for C3 and other organisations, advisory groups and trustee boards, our associates enrich our programmes through their experience and networks. We leverage our knowledge and extensive connections to help you implement thoughtful, evidence-based initiatives that help people live healthy lives.

Our extensive global network of over 2,500 experts from 85+ countries also inform our projects (Join our network).

You can also view our partners and funders.

Christine Hancock
Founder & director
Antonia Bunnin
Beverley Walker
Christopher Exeter
David Okoro
Denise Stevens
Denise Stevens
Global health associate
Elisabeth Morgans
Senior project manager
Hester Rice
Hugo Mills
Communications officer
Jake Brown
Michaela Nuttall
Associate in nursing
Nathalie Vauterin
Sarah Clarke
Monitoring & evaluation officer
Tom Sandford
Nursing, mental health & community development associate

Christine Hancock founded C3 Collaborating for Health after a career working in nursing and Britain’s NHS. When she was President of the International Council of Nurses she saw the impact the growing burden of chronic disease was having across the world. 

Christine’s role:

Christine leads the small team at C3, building on the contacts she made when she was CEO at the Royal College of Nursing and before that as CEO of Waltham Forest’s NHS. An economist from the London School of Economics she believes in the power of data, clear evidence and a good case to secure support from all areas of society necessary to achieve the change that is needed to secure healthier lives, especially for the most disadvantaged people. She is also a member of the NHS Health & Wellbeing Advisory Board.

How Christine practises what she preaches:

Christine stays fit with a weekly Pilates session, she eats much more fruit and vegetables and her pedometer and the WalkIt.com web site have helped her find new areas of London.



Antonia Bunnin is an associate at C3. 

Antonia has over 25 years’ experience in the not-for-profit sector, much of which with health and care organisations. Her previous roles include chief executive of social care charity Guild Care, director of hospice support and development at Hospice UK, director of policy and campaigns at Breakthrough Breast Cancer, and head of public affairs at the Royal College of Nursing. She has also worked as a management consultant with a range of public and voluntary sector clients.

Antonia’s experience includes: strategy development and implementation; charity governance; sector capacity-building and programme development; operational management; service delivery and development; research and evaluation; policy and campaigning. Her interests include inequalities, community development and end of life care.

In addition to working with C3, Antonia is a visiting lecturer at the Centre for Charity Effectiveness, Bayes Business School (formerly Cass), and runs her own consultancy, Abalone Consulting, helping charities to increase the reach, scale and impact of what they do. She is co-chair of The Orchard Project, a national charity supporting community orchards.

Antonia’s role:

Antonia works across all of C3’s portfolio, with a particular interest in community engagement and community development projects.

How Antonia practices what she preaches:

Antonia loves countryside walking and often walks on the beautiful South Downs in Sussex, and occasionally further afield.  She has a very sweet tooth but is trying to eat less chocolate and more fruit and vegetables.




Beverley Walker is the accountant for C3 Collaborating for Health. She is also the founding director of Tall Horse Accounts Limited and is a Chartered Certified Accountant. She has worked in senior management positions at Blue Chip companies in London for several years, and now finds great satisfaction in sharing her knowledge and experience to assist small and medium-sized businesses. 


Christopher Exeter is an associate at C3. He advises on strategy, fundraising, development and publications. Previously, he was a director at UnitedHealth Group, a senior fellow in the Faculty of Medicine at Imperial College London, and a senior civil servant.

Christopher Exeter on LinkedIn

David Okoro is an Education Consultant, Coach and Trainer working with young people and adults in schools, colleges, universities, business and community organisations.

He is passionate about delivering a holistic training approach, incorporating wellbeing and physical health. In particular, David has a keen interest in mental health, especially amongst BAME communities.

David has delivered programmes to over one hundred thousand people in the UK and abroad.

David has also advised government departments (including Department for Communities and Local Government and Cabinet Office), and was a key contributor to the Reach Report. He is a school governor and use to run his own charity which provided scholarships, text books, exercise books and pencils for young people in West Africa (Sierra Leone and Nigeria).

David was also the chairperson of the Anthony Walker Foundation (a charity promoting diversity and tackling hate crime), and was a director of the Nubian Times Newspaper.

In a previous life, David was a social worker providing support to children and their families.

David’s role:

David works across C3’s nursing and community engagement programmes, including creating our Mental health toolkit for nurses

How David practises what he preaches:

David has never smoked and does not drink alcohol. However, he does have a sweet tooth and would rather ditch the main course and go straight to dessert…nevertheless, his willpower is improving and he is eating more fruit and healthy snacks.


Denise StevensDenise is president and founder of US-based MATRIX Public Health Solutions, creators of the CHESS™ community-engagement strategy used by C3. Denise was the Director of Evaluation for Community Interventions for Health (an Oxford Health Alliance programme) which was the first and most comprehensive multinational pilot study focused on the use of structural interventions with community coalition building, health education and social media to impact the burden of chronic disease.

Denise’s role:

She advises on evaluation and C3’s CHESS community engagement programme.


Elisabeth is senior project manager at C3. 

She is a physiotherapist and has completed her Master of Public Health (MPH) at King’s College London. Elisabeth has worked in various areas of health including musculoskeletal health and women’s health, in both the NHS and private sector. Her interest in C3 and as a physiotherapist lies in exploring opportunities to increase participation in physical activity for everybody. 

Elisabeth’s role:

Elisabeth works across much of C3’s portfolio, overseeing and managing projects within our community engagement, workplace health and health professionals programmes. Recent work includes community engagement in the London Borough of Tower Hamlets using CHESS™; community engagement using CHESS™ in C3’s latest multi-partner and multi-site ASPIRE project in England and France; and the development of a toolkit for nurses’ health. 

How Elisabeth practises what she preaches: 

Elisabeth enjoys keeping fit and anything that involves being outdoors. She has walked several stages of the famous Camino de Santiago in Spain, and she enjoys regular 5-10km runs. 


Hester Rice is an associate for C3 and has been with the organisation since its inception in 2009. Before coming to C3 Hester worked for a political academic publishing house, developing an interest in the impact that social, political and economic constructs have on the way that people live their day-to-day lives. Hester was inspired to work with C3 because of the opportunity it offered to advocate for the social change that is needed to make our world a more healthful place.

Hester’s role:

Having worked with C3 for 10 years Hester has a broad and deep knowledge of the organisation. Now located in Cornwall, in the South West of England, Hester is promoting the work of C3 in the region. Hester has worked across much of C3’s portfolio, overseeing and implementing projects and liaising with partners. She has managed high-profile international health events in South Africa, Australia and India, as well as in the UK and overseen the production of numerous reports, and applications for funding.

How Hester practises what she preaches:

After several failed attempts Hester finally gave up smoking on the eve of her first day at C3. She is a member of the London Publishers Softball League, she runs regularly and sometimes practices yoga in her sitting room. She always tries to walk rather than take public transport and spends weekends finding her way across London on foot, or on a country walk.


Hugo Mills is C3’s communications officer and joined the organisation in early 2021. Before coming to C3, Hugo worked at the Palace of Westminster for a Labour Party MP and with an East Africa-based strategy consultancy. He has also successfully campaigned on civil rights and health access issues in his homeland of Ireland. 

Hugo’s role: 

Hugo works across much of C3’s portfolio, overseeing communications between our partners and the public, delivering messaging on C3’s key focus areas through our website, social media, and newsletters. 

How Hugo practises what he preaches: 

Hugo cycles daily and spends as much time as he can outside. 


Jake Brown is C3’s administrator.

Jake has previously worked in varied roles within the employment sector; supporting those with mental and physical health barriers to reach their goals and improve their lives.

With nearly 10 years’ experience within the not-for-profit sector and a keen interest in mental health, Jake moved into public health working on various projects, one of which helped support men’s mental health. Learning of C3’s work on NCDs and the impact they have on mental health, Jake was keen to be involved.

Jake brings with him nearly 10 years of Administration experience, and has worked as a contract support assistant, an employability coach, and a management information assistant for national contracts, and a project coordinator for public health contracts across the UK and the EU. Recently qualifying to NVQ Level 4 in Business Administration.

Jake’s role:

Jake works across most areas of C3; providing administration support to staff, associates and contracts.

How Jake practises what he preaches:

Jake likes countryside walks and practising mindfulness. He tries to have a balanced vegetarian diet (but is trying to cut down on the sugar and the cheese!)


Michaela Nuttall is C3’s associate in nursing. She is a cardiovascular nurse specialist with a unique and varied experience across the NHS and beyond. She developed her passion from prevention 20 years ago and has worked within it ever since.

Having recently left the NHS after 27 years, Michaela is the clinical director at Smart Health Solutions, Deputy National Lead for CVD Prevention at Public Health England, and is overjoyed to have joined C3 in 2016. Often seen as the voice of reason, and bringing balance and a pragmatic approach to prevention and health, she is the Chair of the Health Care Committee of Heart UK and an invited member of both the Nurses and The Guidelines and Information working party of the British Hypertension Society, elected member of the Association of Cardiovascular Nurses and Allied Health Professional Education working party, on a variety of editorial boards and the Global Cardiovascular Nursing Leadership Forum. One of Michaela’s proudest achievements is founding the HEART UK NHS Health Check Awards. Being a Trustee at PoTS UK keeps her firmly rooted in the challenges patients face in living with life altering conditions.

Often not lost for words, she was delighted and overwhelmed when she won the Nutrition and Health Nurse of the Year Award in 2013.

Joining C3 has meant that Michaela can channel all her experience into prevention both in the UK and globally in supporting and driving forward the aims and goals this wonderful organisation.

Michaela’s role:

Michaela leads on C3’s nursing programme designed by nurses for nurses.

How Michaela practises what she preaches: 

Since joining C3, Michaela now walks to and from the train station whenever she is in the C3 office.  When no-one is watching she throws herself round the living room to a high intensity workout DVD 3 times a week.  She already eats masses of vegetables every day. She has never been a big fan of fruit, so instead of increasing that she has cut down on any mid-week alcohol.




Nathalie Vauterin is a nutritionist and associate at C3. She has completed her Master’s in Nutrition and Eating Disorders with a public health orientation at UCL’s School of Medicine.  

Nathalie works with adults, teenagers and children with weight and health issues, supporting them to thrive in an obesogenic environment to make sustainable lifestyle changes. She has also led various workshops for NHS-funded programmes in various primary schools with parents and children on healthy eating and physical activity. She currently works in a London clinic and at the French Dispensary (DF-SFB) in Hammersmith.

From her clinical experience Nathalie realised that to maintain behaviour changes and create healthier habits, in addition to education, our environment must be shaped differently. Joining C3 means exploring new opportunities to help people make changes in their lives to prevent chronic disease.

Nathalie’s role: 

Nathalie is working with the CHESS team on a European project (ASPIRE) involving multiple partners on both sides of the channel. The ASPIRE project aims to engage the local community using the CHESS tool to co-create needs-based response to address obesity. Nathalie is project manager for the French side of the project.

How Nathalie practises what she preaches: 

Nathalie is a regular runner, having completed a couple of marathons. She has been practicing yoga joyfully for the last 20 years indoor and outdoor. She also enjoys hiking and cycling with her family during her holidays. She sets clear boundaries to restrain her unconditional love for dark chocolate!



Sarah Clarke is monitoring and evaluation officer at C3. She is a global health consultant with experience with organisations in the United States, the Netherlands, United Kingdom, Canada and Mali. Her specialities include non-profit communications and qualitative research, and she has completed projects with the International Rescue Committee, Médecins Sans Frontières and Johns Hopkins Bloomberg School of Public Health (JHSPH). Sarah currently consults for various non-profits in the UK and US, along with being a health technical advisor for International Rescue Committee and the University of Calgary Cumming School of Medicine. She completed her Master of Science in Public Health at JHSPH with a concentration in social and behavioural interventions in global health. 

Sarah’s role:

Sarah works on evaluation and fundraising activities for C3, and also oversees C3’s communications strategy, website, social media, and e-newsletters.

How Sarah practises what she preaches:

Since joining C3 Sarah’s fruit consumption has increased significantly, her stair climbing has become much more ambitious, and she tries to get up from her desk at least once an hour.



Tom Sandford is a C3 associate in nursing, mental health and community development. 
Tom’s leadership, management and service development experience includes managing the NHS mental health service across the London boroughs of Camden and Islington, and as the executive director for the England directorate at the Royal College of Nursing. His clinical experience as a nurse lies in the areas of family interventions and child and adolescent mental health services, and liaison psychiatry in acute hospitals. 

Tom’s role: 

Tom’s role at C3 includes leading on projects in mental health, nursing, employee wellbeing and engagement across communities for health gain. 

How Tom practises what he preaches: 

Tom does all his travel in London by bicycle and is engaged in a variety of local community support initiatives in South London.