Executive team
Meet our Executive team
Our executive team is responsible for the day-to-day running of the hospital
Paul Allen
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Before coming to the RHN Paul was chief executive, and a trustee, of The Abbeyfield Society for six years. Previously, he had been interim chief executive of The Soil Association and chief operating officer and deputy chief executive at the Royal Berkshire NHS Foundation Trust.
Paul initially came to the RHN as the interim chief executive, but was offered the permanent role by the board after being here for six weeks. He took the permanent role because he had been struck by the obvious need and plight of patients, the real need for the services provided and the incredibly supportive staff. Paul believes that looking after families is just as important as caring for patients, and that it’s a privilege to be part of the great work of the RHN. In his spare time he follows Spurs, listens to U2, and goes to Glastonbury every year. |
Nanda Ratnavel
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Nanda joined the RHN in 2016 and is a professional accountant by background having worked in commerce and a charity before joining the NHS in 1988. Nanda spent 18 years in the NHS before moving on to Finance or Corporate Services Director roles at a number of organisations; most recently he was Deputy Principal, Finance and Resources at Richmond upon Thames College.
Nanda has a track record of helping organisations implement major projects, identify development opportunities, achieve cost reductions and improve financial reporting and performance. All of these are allied with a passion for public service and desire to provide the highest quality service to service users. He has retained a keen interest in the NHS and is currently on the board of the NHS Confederation where he chairs the audit committee. Nanda plays football, attends rock concerts and is learning to play the drums in his spare time. |
Dr Steven Luttrell
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Steven qualified in pharmacology and medicine at The University of Glasgow and as a barrister at the Inns of Court School of Law in London. He completed his medical training in north London where he practiced as a consultant physician and geriatrician with a special interest in neuro-rehabilitation working with community teams in the boroughs of Camden and Islington, at St Pancras Hospital and the Brain Injury Unit at National Hospital for Neurology.
Steven has had considerable experience in medical leadership and management. He has been a Chief Operating Officer, Medical Director and Group Medical Director. He has worked in leadership roles for for Camden Primary Care Trust, Central and North West London Foundation Trust, Bupa UK and most recently the Circle Health Group/BMI Healthcare. Steven has an absolute commitment to collaboration, fairness, inclusivity and excellent standards of healthcare. He is known for his empathetic and convincing leadership abilities and exceptional people management skills |
Della Warren
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Della Warren is a highly accomplished international healthcare leader and Board-level Chief Nursing Officer, with extensive experience across the NHS and independent health and social care sectors. She is recognised nationally and internationally for raising standards of care, strengthening clinical governance, leading large-scale service transformation, and driving innovation in patient services and new models of care.
Della was awarded the Queen’s Nurse title in 2013 and the NHS Medal for Safeguarding, Innovation and Excellence in 2021. As Chief Nursing Officer at the Royal Hospital for Neuro-disability, she led the organisation to achieve Leaders in Safeguarding Gold Awards in 2023 and 2025, early implementation of the National Patient Safety Incident Response Framework (PSIRF) in 2023, and an international Pathway to Excellence® designation in 2024. Della’s vision for nursing excellence centres on upholding organisational values through high-quality education, while ensuring access to equitable nursing education as widely as possible. She is an International Mentor for Pathway to Excellence® and a member of the American Nurses Credentialing Centre International Advisory Council. Della has also served as an independent panellist for the Nursing and Midwifery Council and as a national clinical specialist advisor to the Care Quality Commission. She is a registered nurse in both the UK and Australia, a former State Director of Nursing for Queensland, and a former CEO of a large health and social care social enterprise in Southern Queensland. |
Lesley Mill
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With over 20 years experience in neuro-science, Lesley started her director role in January 2019, after joining the RHN in November 2014 as Head of the Brain Injury Service which expanded to encompass professional lead for Allied Health Professionals in 2016.
Lesley gained her BSc in physiotherapy at Queen Margaret University, Edinburgh and also completed a postgraduate MSc in neuro-physiotherapy. Before joining the RHN, Lesley was Head of Physiotherapy at The Wellington Hospital. Passionate about access to sport and exercise for physical and mental wellbeing, Lesley volunteers several times a year to support athletes with disabilities at large sporting events. |
