William Tyzack

""Will Tyzack he is a brilliant junior, who is hard-working and has fabulous attention to detail.""

Chambers & Partners 2026

"A very technical barrister who is adept at dealing with children cases. He is particularly strong on tricky international issues."

Chambers & Partners 2026

"He has a calming presence with clients and is knowledgeable when it comes to international children and finance cases."

Chambers & Partners 2022

"He is particularly great at guiding clients through the most complex of multi-jurisdictional disputes."

Chambers & Partners 2021

"Charming, persuasive and has the case law at his fingertips."

Chambers & Partners 2021

"He’s very, very good and has a gravitas that is beyond his years."

Chambers & Partners

""Will Tyzack he is a brilliant junior, who is hard-working and has fabulous attention to detail.""

Chambers & Partners 2026

Languages spoken: German and French

Nominated as Chambers & Partners Family Law Junior of the Year in 2024, Will specialises in financial disputes on divorce and relationship breakdown. He is renowned for his expertise in international jurisdiction and forum disputes in relation to both finance and children cases, with wider experience in cases involving complex disclosure and national security issues, privacy and human rights.

Expertise

Will is recognised as a specialist in complex financial claims and divorce jurisdiction and forum disputes. He has considerable experience of child abduction cases, relocation and jurisdiction disputes in children proceedings, and cases involving the international protection of vulnerable adults under the inherent jurisdiction and in the Court of Protection. He is a Fellow of the International Academy of Family Lawyers. He has advised solicitors on English law across many EU & worldwide jurisdictions and has provided both written and oral evidence to overseas courts in the course of foreign proceedings.

Having been appointed to the Attorney General’s A Panel in 2024, Will is frequently instructed by the government in cases involving family law and wider areas of public law, immigration and human rights law. He has represented the Department for Education, the Attorney General, the FCDO and overseas territories. In early 2025 he was appointed by the Attorney General to appear as Advocate to the Court, leading Sophie Cullis, in the open justice appeal concerning anonymisation of the judges who had presided over proceedings relating to Sara Sharif (Tickle and another v BBC and others [2025] Fam 105).
Will was appointed to the Attorney General’s Panel of Special Advocates in 2018. He has recently been instructed in cases arising out of the Afghan data leak, appearing as Special Advocate on behalf of a number of Afghan nationals in judicial review proceedings in the King’s Bench Division. Recent work has also included acting as one of the counsel to the Undercover Policing Inquiry.

Member of the Chartered Institute of Arbitrators, having qualified through IFLA in 2021. Will also sits frequently as a private FDR ‘judge’ / early neutral evaluator.

“A very technical barrister who is adept at dealing with children cases. He is particularly strong on tricky international issues.”
Chambers & Partners 2026
“He's always on top of the detail, has good client care skills, and is good on his feet." "He has a calming presence with clients and is knowledgeable when it comes to international children and finance cases." "Powerful and persuasive in court.”
Chambers & Partners 2022
“Charming, persuasive and has the case law at his fingertips.”
Chambers & Partners 2021
“He is particularly great at guiding clients through the most complex of multi-jurisdictional disputes.”
Chambers & Partners 2021
“A smooth and confident advocate who draws well-earned praise from judges, opponents and clients alike.”
Legal 500 2021
“He’s very, very good and has a gravitas that is beyond his years.”
Chambers & Partners
Sonal Kanabar v Dipak Maganal Kanabar (Deceased) & Anor [2026] EWCA Civ 582 DD v AF and others [2026] EWHC 247 S (A Child) (Disclosure to SSD), Re [2025] EWFC 453 MA v WK [2025] EWFC 499 R (oao AFA and others) v SSHD and Secretary of State for Defence [2025] EWCA Civ 825 Ministry of Defence v Global Media and Others [2025] EWHC 2606 (KBD, Media and Communications List) Tickle and another v BBC and others[2025] Fam 105 (Court of Appeal) Xanthopoulos v Rakshina [2024] EWCA Civ 84 (Court of Appeal) WW v XX [2024] EWFC 330 (HHJ Hess: company valuation issues) WK v GC [2023] EWFC 151 (HHJ Hess: variation and capitalisation of maintenance) HA v WA and another [2022] EWFC 110 (Sir Jonathan Cohen: constructive/resulting trusts) Re X (Children) (Article 61 BIIa) [2021] EWCA Civ 1305 G v G (Secretary of State for the Home Department and others intervening) [2021] 4 All ER 113 (Supreme Court) Re Z (a child) (Schedule 1: legal costs funding order) [2021] 2 FLR 727 R v R [2021] All ER (D) 93 Haley v Haley [2020] EWCA Civ 1369 G (A Child: Child Abduction) [2020] EWCA Civ 1185 X v Y (Divorce: Rectification of Decrees) [2020] 2 FLR 981 R v K [2020] EWHC 841 (Fam)  Uhd v McKay (Abduction: Publicity) [2019] 2 FLR 1159 Kelly v Pyres [2019] 1 FLR 62 Hayatleh v Mofdy (Presumption of Marriage) [2017] EWCA Civ 70 J v U (Child Arrangements Order: Jurisdiction) [2017] 2 WLR 760 In re R (Children) (Reunite International Child Abduction Centre and others intervening) [2015] 2 WLR 1583 (Supreme Court) AB v JJB (EU Maintenance Regulation: Modification Application Procedure) [2015] 2 FLR 1143 FL v Registrar General [2011] 2 FLR 630
  • First Class Honours in Geography from Oxford University (2005)
  • Graduate Diploma in Law from City University (2006)
  • Bar Vocational Course (2007)
  • LLM (UCL) Distinction (2018)
  • Middle Temple (Diplock scholarship, Harmsworth exhibition and City University scholarship)
  • Pupillage at QEB 2007-2008
  • Attorney General’s Panel of Special Advocates (2018)
  • Member of the Family Law Bar Association and CoPPA
  • Middle Temple and Western Circuit
  • MCIArb

William speaks German and French. He was brought up in Devon, to where he regularly returns. He enjoys spending time in the sea and in the mountains. 

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