Senior management

Anna Whitton_1.jpgAnna Whitton, Chief Executive Officer

Anna has dedicated her career to working with complex social issues, championing inclusive services that make a positive difference. 

Having worked in the voluntary sector for over 17 years, Anna has developed considerable experience in leading teams to adapt, develop and innnovate to respond to evolving and changing need and content.

Prior to WDP, Anna worked as an Executive Director for BBC Children in Need. She developed and implemented the charity's first Impact strategy before overseeing a significant change programme across the organisation's grant making alongside the charity's funding response to the COVID-19 pandemic.

Anna also have extensive experience in the substance misuse field, having worked at Addaction (now known as We are With You) for 12 years. Starting as a frontline practitioner and manager, her last three years at Addaction were as the Executive Director of Operations.





Dr Arun Dhandayudham, Medical Director

Arun has been a Consultant in Addictions Psychiatry for over 10 years in both the NHS and the Third sector.

He trained in Psychiatry in Oxford and Cambridge before becoming Clinical Director of the NHS addiction services across Northamptonshire and Bedfordshire. He then worked at CRI before joining WDP as Medical Director in January 2015. 

A keen interest in management led to an MBA at Henley Business School and membership of the Faculty of Medical Leadership and Management. Arun has extensive experience of setting up and running community drug and alcohol services, prison substance misuse services and dual diagnosis services.

He continues to be actively involved in the Royal College of Psychiatry Addictions Faculty where he is Coordinator of the Regional Representatives network as well as Chair of the Addictions Faculty Patient and Carer group. His research interests include pain management, online shopping addiction and chronic arousal states such as anxiety and their impact on addictions treatment. 

Arun is also a specialist inspector for the Care Quality Commission (CQC).



Abi Cooper, Head of Quality and Compliance 

Abi has extensive experience of delivering improvements in strategy, governance, quality assurance and performance management in a variety of roles. She has worked in the non-profit sector for nearly thirty years, the last fifteen in a leadership role for charities and local government.

Abi has an MSc in Social Policy and Social Work Studies from the LSE and trained as a mental health social worker. Her skills and knowledge developed from directly delivering services in a number of health and social care settings. 

Abi is committed to developing and implementing innovative solutions, by working collaboratively to deliver services that make a tangible, positive difference in the lives of people who use them.

Abi has also been a Trustee for a homelessness charity in Kent and volunteered for a charity offering mentoring to unaccompanied minor asylum seekers.




Brian McGinn, Director of Finance and Resources

Brian joined WDP in August 2020 from I CAN (a children’s charity for speech, language and communication improvement) where he held an interim Director of Finance and IT role. Prior to that he worked at Northern Ireland’s largest independent telecommunications company and before that, for 20 years, was the Chief Finance Officer (CFO) at Bryson Charitable Group. Along with the Chief Executive and Executive Team at Bryson , Brian led the charity from being a small care charity with 60 staff and a budget of less than £1m to over 800 staff, a budget of £50m+ and £11m reserves.  As CFO he developed Bryson to become a charitable group of social enterprise companies consisting of both trading commercial and charitable subsidiaries sourcing income from commercially tendered contracts, grants and fund-raising.




Craig Middleton, Joint Head of Services

As one of our Operations Managers, Craig led on a portfolio of adult and young peoples’ community services in London and Hertfordshire, spanning integrated, criminal justice and supported housing.

He started out as a frontline practitioner before working through local leadership positions and into Operations. Craig has over 10 years’ experience in the field and holds a Master of Arts degree as well as management qualifications.  A CQC Registered Manager and a PRINCE2 Practitioner, he is also an Organisational Coach and has supported the development of managers within WDP.

He has used his skills and experience at the organisation on lead implementing new business, successful re-tenders, and oversee CQC Audits.










Graham Howard, Head of Commercial Development

Graham has been working in substance misuse business development for over seven years. Within this time, he has secured multiple high value substance misuse contracts.  Prior to this, he worked in the welfare-to-work sector which involved directly supporting the long-term unemployed into sustainable work.  He also studied languages at university and is fluent in French and Portuguese.  Graham is responsible for driving our strategic growth agenda.













sri_0.PNGSri Muthukumaru, Head of IT

Sri has over 20 years experience in the IT industry. Since 2004, he worked as Head of IT in public and voluntary sectors such as the Multinational Charitable Housing and Care, NHS and Higher Education Sectors. He has an MSc in Information Systems & Engineering from Southbank University and a BEng (Hons) in Electronic & Communication Engineering from the University of North London.
Sri provides innovative solutions for everyday work environments in order to effectively achieve the vision and objectives of the organisation. He has extensive experience in core IT technical skills, management of staff, projects, programs, budgets, IT & Office procurement and IT Contracts; IT strategy planning and implementation, business analysis and development, planning and design of IT infrastructure, merging IT departments and systems and restructuring and outsourcing IT services. 
Sri currently serves as the General Secretary at Croydon Academy of Eastern Art where he previously worked as an Education and Welfare Officer.

tom__0.PNGTom Sackville, Joint Head of Services

Tom has over 25 years’ experience working in Health and Social Care. He initially qualified as a Probation Officer, completing a Diploma in Social Work, before working for Turning Point with probation clients whose offending was linked to substance misuse. As part of this role he developed work with local youth justice services, triggering an interest in work with young people’s services.  Following this, he was responsible for the development of a bail supervision and support and Intensive Supervision and Surveillance service working across three London Youth Offending Services, providing holistic intensive alternative to custody programmes for young people. 
Tom then worked for Catch22 for 14 years as an Operations Director, with responsibility for a diverse portfolio of services spanning a range of delivery, including substance misuse and emotional health, leaving care, gangs, youth crime prevention and housing. This involved national programmes, as well as local delivery, and taking an organisational lead on gangs and youth justice. It also included responsibility for policy and research work with a number of studies on youth violence being published.
Tom manages a portfolio of services for WDP, including taking a lead on our young people’s services. He retains a keen interest in research and how this can be used to improve practice. He brings experience in managing relationships and supporting services to maximise their impact.