Dr 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, MRPharmS, IPresc

Marylyn has been qualified for over 20 years and is a Specialist Substance Misuse and an Independent Pharmacist Prescriber. Marylyn is the professional lead for medicines management within the organisation. She is WDP’s Medicines Safety Officer, Home Office Responsible Person and Controlled Drugs Accountable Officer.

She is responsible for all professional pharmacy issues and ensuring the highest standards of corporate and clinical governance are maintained across WDP. Marylyn ensures all WDP services are adhering to CQC standards, legal regulatory and compliance standards in relation to medicines management. 

Before becoming WDP's Chief Pharmacist, Marylyn worked as the Director of Pharmacy 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 smoking cessation services and minor ailment clinics in  prisons and general practice. 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.