Trustees are elected by the ASO Membership and serve a three year term. Vacancies are advertised to the Membership when they become available and an on- line ballot is run if nominations exceed the number of vacancies.

If you wish to contact a Trustee, please email the ASO Office at

Dr Simon Williams

  • Chair/Chair of Finance, Governance & Membership Committee/Secretariat Liaison Officer
  • Subject Leader for Public Health at the University of South Wales

Dr Nicola Heslehurst

  • ASO Network Officer (NI, Wales, Scotland & The North of England)
  • Lecturer and NIHR Postdoctoral Research Fellow at Newcastle University, and an associate member of Fuse (one of five UK Public Health Research Centres of Excellence, and part of the School for Public Health Research).

Dr Graham Finlayson

  • Chair of Finance, Governance & Membership Committee/Communications Officer
  • Associate Professor at the School of Psychology, Faculty of Medicine & Health, University of Leeds

Dr David Hughes

  • Midlands regional lead
  • Consultant in Endocrinology & Bariatric Medicine at the East Midlands Institute of Bariatric Medicine (Royal Derby Hospital).

Dr Barbara McGowan

  • Co-chair Clinical Practice & Obesity Management Committee/COM & Training Officer
  • Consultant and Honorary Senior Lecturer in Diabetes and Endocrinology at Guy’s and St Thomas’ Hospital London

Dr Abd Tahrani

  • Co-chair Clinical Practice & Obesity Management Committee
  • NIHR clinician scientist at the University of Birmingham (UOB) & Consultant in Obesity at Birmingham Heartlands Hospital

Dr Clare Llewellyn

  • ASO Network Officer (Midlands, South West, London & South East, East of England & Yorkshire)
  • Lecturer in Behavioural Obesity Research at University College London

Mr Ken Clare

  • Patient Groups Link Officer
  • Registered nurse and Chair of WLSinfo, the UK's largest patient obesity charity.

Dr Matthew Capehorn

  • Primary Care Link Officer/Health Professionals Link Officer
  • Medical Director at Lighter Life, Clinical Manager at Rotherham Institute for Obesity