Clinical team

Arun_3.jpgDr Arun Dhandayudham, Medical Director

MBBS, MRCPsych, CCT (Addictions Psychiatry), PgDip (Mental Health Law), PgCert (Med Ed), MBA (Henley Business School), MFMLM

Dr Arun Dhandayudham leads on medical practice across WDP. Arun has been a Consultant in Addictions Psychiatry since 2005 and trained in Oxford and Cambridge. He was previously Clinical Director of the NHS Addictions services across Bedfordshire and Northamptonshire as well as Clinical Lead within CRI. Arun has extensive experience in setting up community drug and alcohol services, prison services and dual diagnosis services. He has an interest in online shopping addiction, PTSD and chronic arousal states such as pain and anxiety. He also sits on the Royal College of Psychiatry Addictions Faculty serving as Coordinator for the Regional Representatives network as well as Chair of the Addictions Faculty Patients and Carers group.






Marylyn Nathan-Wilson, Chief Pharmacist

BSc Hons, MPharm

Marylyn Nathan-Wilson is a Specialist Substance Misuse Pharmacist and non-medical prescriber. Her main responsibilities in WDP are ensuring governance requirements are met in relation to medicines management. Before becoming WDP 's chief pharmacist, Marylyn worked as the Chief Pharmacist at the Churchill London Clinic (2005 - 2010) and Chief Pharmacist for HMP Belmarsh, Thameside and ISIS ( 2010 - 2015). She has also worked with the South Maudsley NHS Trust and Central North West London Foundation Trust  and her experience covers all aspects of substance misuse treatment, general health promotion and staff development. She has been involved in setting up new pharmacy services and clinics in hospital, prisons and community pharmacy. She has a special interest in dual diagnosis and harm reduction measures.






Benedicta Xulu, Lead Nurse

Benedicta qualified as a registered mental health and general nurse in 1995 and has worked in the substance misuse field since 2002. She went on to study MSc in Clinical and Public Aspects of Addiction at King's College, London and later qualified as a Non-Medical Prescriber. She has worked as a lead nurse in various organisations, both custodial settings and in the community since 2010 until joining WDP as an organisational lead nurse in 2018.

Benedicta works closely with our central clinical team to ensure that our clinical services have robust processes and governance in place to operate safely and effectively.  She also provides clinical leadership to nursing staff across the organisation.