‘Dermot is an impressive advocate who provides cogent arguments.’
Legal 500, 2025“He is authoritative, well prepared and calm in his approach.”
Chambers & Partners, 2025
About
Dermot worked as a mental health and child protection social worker before he was called to the Bar. He has an MSc from the London School of Economics in Social Work. The experience of working as social worker is very pertinent to public law and judicial review proceedings. Dermot represents all parties in public law and judicial review proceedings and in disputes between local authorities. Dermot has been involved in cases at all levels of court, including the European Court of Human Rights.
Experience
Dermot was called to the Bar in 1994. Dermot worked as a mental health and child protection social worker before he was called to the Bar. He has an MSc from the London School of Economics in Social Work. The experience of working as social worker is very pertinent to public law and judicial review proceedings. Dermot represents all parties in public law and judicial review proceedings and in disputes between local authorities. Dermot has been involved in cases at all levels of court, including the European Court of Human Rights.
Dermot provides training to solicitors and local authorities on adoption, fostering, human rights, disputes between local authorities, accommodation under S 20 CA 1989 and other areas of law and practice on request.
Testimonials
“Dermot is an impressive advocate who provides cogent arguments.” Legal 500, 2025
“Dermot’s considered, clear approach is invaluable, particularly if tricky points of law have to be explored.” Chambers & Partners, 2025
“He is authoritative, well prepared and calm in his approach.” Chambers & Partners, 2025
“Dermot is a go-to for complex lengthy cases.” Chambers & Partners, 2025
“When instructing him one feels confident that no stone will be left unturned.” Chambers & Partners, 2025
“Dermot scrutinises the evidence and presents cogent arguments to the court.” Chambers & Partners, 2025
“Dermot Casey always makes those that instruct him feel at ease. He’s very knowledgeable and puts arguments to the court on behalf of children which put guardians at ease.” Chambers and Partners 2023
“Having Dermot on a case makes life so much better. He covers all aspects and keeps you informed.” Chambers and Partners 2023
Practice Areas
Human Rights
Private Law Children
Education and Professional Memberships
BA – Double First
MSc – Social Work (LSE)
Certificate of Qualification in Social Work
Diploma in Law (City)
Family Law Bar Association
International Association of Irish Lawyers
Middle Temple
INQUEST Lawyers Group
Cases
London Borough of Hillingdon v AO [2014] EWHC 75 (Fam)
KD & LD v Havering LB Council [2010] 1 FLR 1393
Re R (Placement Order) [2008]1 FLR 1259
Re U (Care Proceedings: Criminal Conviction: Refusal to Give Evidence) [2006] EWHC 372 [2006] 2 FLR 690 (Fam)
Re H (A child) (Care order: appropriate local authority) [2003] EWCA Civ 1629
Re O (Care Proceedings: Evidence) [2003] EWHC 2011 (Fam)
P,C and S v United Kingdom [2002] 2 FLR 631
R v Feggetter and Mental Health Act Commission [2002] 3 WLR 591
M v LB Islington and L [2002] 1 FLR 95
Re D ( Evidence: facilitated Communication) [2001] 1 FLR 148