We were established in 2000 by Robin Witt as the Rift Valley Tree Trust (RVTT). RVTT’s first partner was FOMAWA – Friends of the Mau Watershed – who shared a desire to protect and conserve the Rift Valley’s beautiful, but shrinking, bio-diverse environment. We spent the first 12 years working with partners involved in tree planting, water harvesting and fuel-efficient stove projects. Over this time, we met many women who were having more children than they wanted due to a lack of family planning, trapping the family in a cycle of poverty.

In 2012, we started working with a new partner, CHAT, who were using an integrated community mobilisation and mobile clinic model to provide family planning and primary healthcare services in remote and marginalised areas of Kenya. We changed our name to Community Health And Sustainable Environment (CHASE) to reflect the new focus on community health programmes alongside our existing environmental and tree-planting projects.

We now work with 7 partners across Kenya and Uganda to deliver tree-planting and ecological restoration programmes alongside family planning and healthcare services.

Meet the Team

CHASE Africa is composed of a small core team based in Somerset, UK.

Henry PomeroyDirector
Henry joined CHASE Africa in 2013 to become the charity’s first full-time Director, following a long and varied career in international development. Henry completed an MSc in Tropical Agricultural Development at Reading University before spending two years in Ghana with Tear Fund setting up a farmer training scheme. He worked as a Programme Coordinator for nine years with Action on Disability in Development, and then for seven years as Programme Coordinator and Country Director for Rwanda at Send a Cow, developing and managing development programmes focused on poverty alleviation through training in sustainable agriculture and livelihoods. During his three years in Rwanda, he also did some consultancy work for Water Aid.
Robin WittFounder and Head of Fundraising
Following many years spent visiting and living in Kenya, and seeing first hand the devastating effects of rapid deforestation, Robin set up the Rift Valley Tree Trust (RVTT) in 2000, which partnered with grassroots organisations to establish tree nurseries and plant woodlots in schools around the Rift Valley. Before founding the RVTT, Robin ran a vineyard and herb nursery for 20 years, following a degree in Agriculture from Wye College. He also has an MSc in Environmental Science, Policy and Planning from Bath University, which led to work with the RSPB, English Nature, The Farming and Rural Conservation Agency and DEFRA.
Alice OwenFundraising Coordinator
Originally from Kenya, Alice’s career in wildlife conservation involved managing programmes to support jobs, education and livelihoods for people living around conservation hotpots. Alice has since worked for the Soil Association and the BBC Natural History Unit. In 2017, she completed an MA in Wildlife Film-making with a film documenting the inspiring life of a poacher’s son who became a conservation pilot, personifying the hope she has for the future of African conservation. Alice brings to CHASE Africa an acute understanding of life in Kenya and communities’ development needs.
Claire NichollsFundraising Coordinator
Claire developed an interest in Africa during a summer expedition to a rural school in Zimbabwe at the age of 16, returning in her gap year to work in Bulawayo before completing a degree in Development Studies at the University of East Anglia. Before joining CHASE she spent 4 years living with her husband in India running the family business and developing an awareness of the issues that cause poverty.
Rory MacdiarmidCorporate Fundraising Coordinator
Rory was brought up in Sudan, served in the British Army and has spent much of his working life in Asia and East Africa. After a successful career spanning over 20 years in the city, he left Somerset and set up and managed a company building refugee camps in East Africa for 5 years. Returning to Somerset in 2016, Rory joined CHASE Africa as a part-time fundraiser to address the unmet need for family planning that he had witnessed in so many of the areas he lived.
Adrian FrostFundraising Coordinator & IT
Adrian joined CHASE Africa in 2013 after living and working for 13 years in Belgium. With a background in IT, computing Adrian is responsible for CHASE’s website, IT and media as well as doing fundraising specifically for our tree planting projects in schools.


Toby AykroydChair of Trustees
Following an initial posting to the UN Development Programme, working on agricultural projects, Toby’s career has mainly involved business management, under contract to government and in the private sector. He co-founded the Population and Sustainability Network (PSN) and is trustee of the Margaret Pyke Trust. Toby was also founder of the Wild Europe initiative and executive trustee of the European Nature Trust, as well as the now disbanded BBC Wildlife Fund, where he chaired its Funding Support Group.
Julia Hailes
Julia is a sustainability pioneer, with over 30 years working in the green sector. She’s a campaigner, speaker, consultant and writer and has written nine books to date, including the best-selling Green Consumer Guide. Julia co-founded the think tank consultancy SustainAbility and the Haller Foundation, which promotes sustainable living in Kenya through agricultural training, tree-planting, dam building and education, as well as family planning. In 1992 Julia received a UN Global 500 Award for outstanding environmental achievement and in 1999 was awarded an MBE.
Sue Martin
Sue is a retired State Registered Nurse, who worked in Kenya for 17 years – in the foot hills of Mt. Kenya, where she taught first aid and community health – and with the nomadic pastoralists in the far northern deserts of Kenya. This involved working with women’s groups to help them set up small businesses and become more self sufficient, and also tackling issues such as early child marriage and female circumcision within the community. Together with her husband, Sue set up a charity – “Friends of Marsabit” – to raise funds and awareness for this large marginalised area of Northern Kenya.
Dossie Payne
Dossie was born and raised in Uganda and her cousin founded CHAT, one of CHASE’s partners, in Kenya, which has led her to being involved on a voluntary basis with CHAT since 2005, helping with grant applications and fund-raising. She has a BSc in Geology, MSc in Exploration Geology and Geophysics and an MBA from Open University.
Anna Campbell-Johnston
Anna has worked in the field of international development in Africa for over 20 years, with Christian Aid, CAFOD, Action on Disability and Development and now Send a Cow. Her responsibilities have included planning and budgeting, personnel management, institutional fundraising and evaluation.
Oliver Whaley
Ollie is based at the Royal Botanic Gardens Kew, and is specialised in working with agricultural sectors to address the challenges of plant and biodiversity extinction, food security and use of plants for provision of sustainable livelihoods. His work is underpinned by social and cultural inclusion and focused on conservation, research and restoration of dry forest ecosystems.
Mike Wheeler
Mike is a retired chartered civil and structural engineer who has lived and worked in Nairobi. Seeing first-hand the link between large family size and poverty in developing countries, he became the Local Groups Facilitator for the charity Population Matters. He is an experienced fundraiser for charitable causes.


Sir Ghiliean PranceFormer Director of Royal Botanic Gardens, Kew
Ghillean worked from 1963 to 1988 at The New York Botanical Garden. Much of his career there was spent conducting extensive fieldwork in the Amazon region of Brazil. He was Director of the Royal Botanic Gardens, Kew from 1988 to 1999. Since his retirement he has remained very active, notably involving himself with the Eden Project. He is actively involved in environmental issues, a trustee of the Amazon Charitable Trust and a Vice-President of the Nature in Art Trust.
John Guillebaud Emeritus Professor of Family Planning & Reproductive Health, UCL
John was born in Burundi, brought up in Rwanda, Uganda and Kenya, and continues to make regular training and support visits for healthcare professions in Central and Southern Africa. Ex-Medical Director of the Margaret Pyke Centre for Study and Training in Family Planning, he is currently Research Director at the Elliot-Smith Clinic, Churchill Hospital, Oxford, where he is involved in studies of the world’s first male contraceptive pill. He is author/co-author of around 300 publications on environmental sustainability, reproductive health and population, and contraception for women and for men. He is the originator of the Environment Time Capsule Project (1994-2044), Chair of People and Planet, Adviser to Population and Sustainability and Patron of Population Matters.
Kevin McCloudTV Presenter
Although best known for his TV series Grand Designs, Kevin has always been interested in environmental issues. He is an ambassador for World Wildlife Fund for Nature, actively campaigning to promote One Planet Living, the WWF sustainability initiative. He is Patron of the Carymoor Environmental Centre and the Genesis Project, and he is also an Ambassador for the Australian organisation One Tree Per Child (OTPC). This connection led to CHASE starting a One Tree Per Child project in Kenya.
Adrian HayesAdventurer, author, speaker and sustainability ambassador
Adrian is a British record-breaking adventurer, author, keynote speaker, and sustainability campaigner. A former British Army Officer, who also spent two years in the Special Forces, he has conquered Everest, K2, the North and South Poles, the length of Greenland by kite-ski and the Arabian Desert by camel amidst a lifetime of adventure, setting two Guinness World Records, writing two books, and featuring in three documentaries to date.

In his campaign work, he is an ambassador on economic, social & environmental sustainability, a patron of Population Matters and the founder of MIRA Himalaya – an ongoing project providing medical treatment and health & hygiene education in the remote areas of the Himalayas.