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Current Position & Background
Arabella Tresilian is a CEDR-Accredited civil, commercial, workplace and employment mediator, admitted to the CEDR Panel in 2024, with a specialist focus on health, care and disability disputes. Since her accreditation in 2017 she has undertaken over 120 cases, working across the NHS, local authorities, care providers, charities and private organisations. In 2024 she was awarded a Churchill Fellowship to explore conflict resolution in palliative care internationally. Before entering dispute resolution, Arabella spent 20 years as a public sector professional in education, health and social care, delivering organisational development and strategic leadership. She brings additional personal insight as a family caregiver and service user, and is a qualified Mental Health First Aid Instructor. She works in English and working Spanish.
Practice Areas
Health, NHS and social care disputes (medical treatment, care planning, end-of-life, palliative care) Mental capacity and best interests (Mental Capacity Act, Court of Protection) Mental health (Mental Health Act, judicial review) Workplace and employment (discrimination, bullying, grievance, EDI, neurodiversity, sickness absence) Charity and third sector (trustee and governance disputes, volunteer relations) Education (SEND, exclusions, staff disputes, headteacher relations) Community and neighbour disputes Elder care and family disputes (care planning, lasting powers of attorney, estrangement) Equality Act matters (race, disability, LGBTQIA+, transgender)
Mediation Style
Arabella’s approach is built on deep listening, equitable participation and a genuine commitment to helping each party feel heard and understood. Her pre-mediation process includes tailored one-to-one conversations to build trust and clarity before parties come together. She is particularly skilled at supporting individuals to express themselves amid emotionally complex or high-stakes decisions, especially where trauma, illness, disability or power imbalances are present. She creates safe, inclusive spaces for honest dialogue, and is experienced in trauma-informed practice and mental health-aware facilitation. Clients and legal professionals consistently describe her as empathetic, perceptive, measured and inclusive – equally comfortable working with senior legal and clinical professionals as with individuals encountering mediation for the first time.
Client feedback:
“Thank you for being a rock star mediator! So wonderfully positive and a force for good!” Family member, Court of Protection mediation
Client feedback:
“Thank you for being a rock star mediator! So wonderfully positive and a force for good!” Family member, Court of Protection mediation
“Arabella brought a very empathetic, inclusive approach which made everyone feel listened to and we were able to make some constructive progress.” Barrister, Court of Protection mediation
“I think you’re in a line of work that demands a very high degree of tact, empathy and wisdom — you demonstrated all of those qualities throughout.” Manager, Workplace mediation
“You helped us to find a new perspective on this extremely complex dispute.” Public law solicitor, Judicial Review mediation
“Mediation feels quite daunting initially, but after some time with Arabella you feel much more at ease and start to get somewhere.” Patient, Judicial Review mediation
“If Arabella could clone herself and send us a copy!” Trustee, Care charity board dispute
Mediation Experience
Arabella has over 120 mediation and facilitation cases to her name since 2017, spanning civil, commercial, workplace, employment and community contexts. Her particular depth of experience lies in complex, multi-party health and social care disputes – including medical treatment decisions, care planning, mental capacity, end-of-life care and judicial review proceedings – often involving NHS trusts, local authorities, care providers, legal representatives and families simultaneously. She has worked alongside leading legal chambers and solicitors’ firms including 39 Essex Chambers, Irwin Mitchell, Bindmans, Doughty Street Chambers and Leigh Day. Her workplace and employment experience spans board and CEO level disputes, discrimination and equality matters, neurodiversity, bullying and harassment, and team breakdown across public, private and third sector organisations. During the pandemic she trained 2,800 public sector employees in conflict resolution and mental health conversations.
Mediation Education
CEDR Accredited Mediator — Civil & Commercial, plus Workplace & Employment (CEDR, 2017) OCR Conflict Resolution Skills (Bristol Mediation, 2016) Postgraduate Diploma in Educational Management & Leadership (University of Bath, 2014) MA Hons, English Literature (University of Edinburgh) Mental Health First Aid Instructor (MHFA England, 2019–2023)
Teaching & Mentoring
Arabella is an active trainer and educator in conflict resolution. She is a Consultant and Trainer with CEDR (2018–present) and an Affiliate Mediator and Trainer with UK Mediation (2024–present). She has delivered conflict resolution and mental health conversation training to over 2,800 public sector employees, and provides Prevent & Resolve Conflict training for organisations. She also offers 1:1 conflict, negotiation and communication coaching, and consultancy in conflict and change management.
Mediation Publications
Arabella is a national speaker and advocate on health, care and conflict resolution, having been featured by ITN News, Sky News, Channel 5 News, BBC Radio 4’s Inside Health, the Financial Times, iNews, Public Health England, NHS England, the British Medical Journal, the King’s Fund, Scope, Good Housekeeping, Psychologies Magazine and The Sun.
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