William undertook pupillage in chambers in 2016/17, and joined chambers on completion of pupillage in 2017. His practice encompasses the following areas of law:
William undertakes a significant amount of work on a pro bono basis, and was recognised for his contribution in helping to secure access to justice for those who cannot afford legal representation and are not eligible for public funding by being awarded the Birmingham Law Society Pro Bono Award in March 2023.
In his spare time, William is a confirmed “cricket tragic” and cinephile. He has combined these two interests as one of the executive producers of 501 Not Out, a documentary about the cricketer Brian Lara.
William has developed a substantial practice across the spectrum of family law, appearing in proceedings under Parts II and IV of the Children Act 1989, as well as proceedings under the Matrimonial Causes Act 1973, the Family Law Act 1996 and the Trusts of Land and Appointment of Trustees Act 1996.
William regularly appears on behalf of Local Authorities, parents, children and intervenors in the Family Court and the High Court. He has appeared alone in the Court of Appeal, and has also appeared alone against QCs in the High Court and the Family Court.
William is developing a significant practice in cases involving placement of children outside of England and Wales, and has recently been instructed in two such cases where the court has received expert evidence on the law of the country where placement is proposed. He is regularly instructed in cases of the most serious nature, including cases involving child deaths and serious physical, emotional and/or sexual abuse.
William’s private law practice focuses on cases where the court has appointed a Guardian pursuant to Rule 16.4 of the Family Procedure Rules. He has significant experience of “high conflict” cases involving allegations of physical abuse, sexual abuse, parental alienation, and potential child criminal or sexual exploitation.
William regularly advises clients on matters concerning ancillary relief and trusts of land, and has appeared in both the Family Court and the County Court in such cases. In common with his child law practice, William has acted in cases with an international element and involving issues of jurisdiction and recognition of orders made in England and Wales in foreign courts.
William continues to develop his practice in this highly specialised area. He acts for Claimants and Defendants in the County Court and the High Court. He has a particular interest in claims arising out of care proceedings, where his significant experience of acting in care proceedings gives him an invaluable insight into the subject-matter giving rise to the abuse and neglect claim.
Family law
Care
Private Law
Ancillary Relief and Trusts of Land
Abuse and neglect
Court of Appeal
M (Children: Applications by Email) [2021] EWCA Civ 806
(Hyperlink here – M (Children: Applications By Email) [2021] EWCA Civ 806 (28 May 2021) (bailii.org))
AV (A Child) (Expert Report) [2020] EWCA Civ 346, [2020] 2 FLR 203
(Hyperlink here – https://www.bailii.org/ew/cases/EWCA/Civ/2020/346.html)
High Court
Tousi v Gaydukova [2023] EWHC 404 (Fam)
(Hyperlink here – Tousi v Gaydukova (Rev1) [2023] EWHC 404 (Fam) (27 February 2023) (bailii.org))
A Local Authority v The Mother and Ors [2022] EWHC 3043 (Fam)
(Hyperlink here – A Local Authority v The Mother & Anor [2022] EWHC 3043 (Fam) (17 October 2022) (bailii.org))
C (A Child: Care Proceedings – Inherent Jurisdiction – Deprivation of Liberty) [2019] EWFC B72 (Comm)
(Hyperlink here – https://www.bailii.org/ew/cases/EWFC/OJ/2019/B72.html)
K, T and U (Placement of Children with Kinship Carers Abroad) [2019] EWFC 59
(Hyperlink here – https://www.bailii.org/ew/cases/EWFC/HCJ/2019/59.html)
J (A Child: Care Proceedings: Apportionment of Experts’ Fees) [2017] EWFC B49
(Hyperlink here – www.bailii.org/ew/cases/EWFC/OJ/2017/B49.html)
“He is always well prepared and is quick to understand a complex set of circumstances, getting to the crux of the issue swiftly.” Chambers & Partners 2025
William is ranked (Tier 3) for Family: Children in the 2024 edition of Chambers and Partners.
“William is always excellently prepared, he knows the law intricately and applies that to find pragmatic options for the client.” Chambers & Partners 2024
“He was always available and provided quick and efficient advice.” Chambers & Partners 2024
William is ranked as a “Rising Star” (Tier 1) for Family and Children Law in the 2024 edition of the Legal 500.
“William is always excellently prepared, he knows the law intricately and applies that to find pragmatic options for the client.” Chambers and Partners, 2024 edition
“William is a calm but powerful advocate.” Chambers and Partners, 2024 edition
“William is always incredibly well-prepared and meticulous in his attention to detail. He has very good client care skills and keeps his instructing solicitors well informed of developments. His attendance notes are always of high quality. He has a very non-confrontational style of advocacy which is very effective.” Legal 500, 2024 edition
William is ranked as a “Rising Star” (Tier 1) for Family and Children Law in the 2023 edition of the Legal 500.“Rising star William Horwood is an ‘incredibly articulate advocate’ and is frequently instructed in difficult cases related to child death and abuse.” Legal 500 2023
“William is a very good counsel who advises the client and puts the client’s case even if the views of the client go against the advice which has been provided. He is very good at meeting the client’s expectations and very good at putting the client’s case across.” Legal 500 2023 edition
The court of appeal has today handed down judgment in tourist v gaydukova 2024 ewca civ 203
William Horwood completes 2023 Pro Bono Pledge
BLS Pro Bono Award for William Horwood
Pro Bono Award Shortlisting for Family Barrister
William Horwood completes 25 for 25: The Pro Bono Challenge
Five St Philips barristers in the Court of Appeal
G (Children: Fair Hearing) [2019] EWCA Civ 126 – by William Horwood
English
Russian