The board


Our board governs the organisation. It is elected by the guarantor members at the Annual General Meeting each year. This committee is responsible for developing and reviewing strategy; monitoring performance; setting values, policies, and standards; ensuring adherence to aims, good governance, proper risk management; and compliance with legal requirements and obligations to stakeholders.

Our President, Jonathon Porritt, attends board meetings but does not vote.


Terry Murphy, Chair

Formerly a Navy Officer, Terry has spent nearly 30 years founding, running and advising businesses and organisations. He brings a business and strategic perspective to the population discussion about which he feels passionately. Having spent many years volunteering with youth and schools, he is dedicated to making the world a better place for future generations.

Fiona McKenzie, Vice-chair

After working in investment banking, Fiona ran her own practice in alternative medicine and facilitated mezzanine financing deals. She has spent the last decade working on human/wildlife conflict-resolution projects and is a trustee of the Green World Campaign.

Maggie Avison

Currently working as a freelance researcher, Maggie has been involved in the charity sector for more than 15 years, working at two international animal welfare organisations and volunteering for several other animal welfare and environmental charities during this period. 

Stephen Bown

Emeritus Professor of Laser Medicine and Surgery and Director of the National Medical Laser Centre, at University College London. He is also an Honorary Consultant Gastroenterologist, University College Hospital.

Harry Cripps

A chemical engineer and chartered environmentalist with 40 years process industry experience, now semi-retired, his engineering and consultancy career has included pollution control, water, and waste minimisation, energy optimisation, process integration and development of environmentally sustainable technology.

John Davies

John is a retired teacher with experience in business. Involved in setting up and running Population Matter's local groups, he works to develop measurable, effective engagement, given the decreasing timescale we have in which to halt environmental degradation.

Pip Hayes

A semi-retired GP in Devon, Pip was a member of the PM board previously and has only recently rejoined it. She is also a board member of the Tamar Faculty of the Royal College of General Practitioners and a nonexecutive board member of Devon Doctors. She was inspired to join Population Matters after meeting our patron Prof John Guillebaud at a family planning training event.


Anna Hughes

Anna is a qualified teacher and currently works as a cycling instructor. She is also a writer, penning articles about cycling and sustainability for newspapers, magazines and websites. Anna has been involved in the Green Party for many years, gaining experience in the campaigning and environmental sectors. She has appeared in several media interviews, speaking about her decision to remain child-free for the environment.

Emma Olliff

She is an ecologist focusing on farming and its future with regards to increasing population and decreasing biodiversity. Working on a project called RegenerEat which aims to reconnect people with their ecosystem through their food, supporting regenerative agriculture and building resilient, holistic food systems.

Sara Parkin OBE

Sara is Principal Associate of The Sustainability Literacy Project. She is also Co-founder of Forum for the Future, Chair of the Richard Sandbrook Trust, Trustee of the St Andrews Prize and board member of the Carnegie Trust for the Universities of Scotland.

Ascanio Vitale

He has volunteered and worked for several environmental organizations, including as a climate campaigner for Greenpeace and the World Wildlife Fund. He is a Chief Executive Officer of engineering consulting companies Stop CO2 and Flyzen.


Honorary treasurer: Percy Kelland

Percy is a Chartered Accountant (FCA) with over 38 years’ experience in the voluntary and commercial sectors. He worked for 21 years for KPMG, 6 years at director level in industry, and 11 years as a self-employed business adviser. Having grown up on a farm on Exmoor, he has a lifelong passion for wildlife and conservation issues and is an active supporter and adviser to a number of charities.