William Seagrim

William Seagrim

William Seagrim is an associate tenant. He is a full - time Senior Lecturer at Swansea University and has only limited availability to accept instructions outside teaching semesters.

Year of Call: 2007

William is a lecturer and barrister specialising in family law, particularly public children law.


When conducting cases, William practices in all areas of family law, with a particular interest in child protection proceedings. William has been recommended in the Bar Directory ‘Chambers and Partners UK’ (2015 and 2016), and has appeared in reported cases, such as Re HA (A child) (no 2) [2015] EWHC 1310 (Fam), [2016] 1 FLR 966 and Bristol City Council v AA & HA [2014] EWHC 1022 (Fam), [2015] 1 FLR 625.


William is the author of several family law publications, most notably:

-          Public Children Law: A Case Law Compendium (Bloomsbury, 2022) - a practitioner’s text on public children law

-          Best Interests: The “Gold Standard” or a Gold Plating? Should Significant Harm be a Threshold Criterion in Paediatric Cases? (Trivent, 2019) – a book chapter discussing the attempted use of public children law principles in medical futility cases; and

-          “No Questions, Your Honour” Challenging the unchallenged expert in closing: a permissible tactic in children cases? (Family Law, forthcoming in 2022) – a journal article considering expert evidence in children law, co-authored with Gareth Evans, of 9 Park Place Chambers.



William has taught at university level since 2015. Amongst other topics, William teaches both child protection law and advocacy at Swansea University, where he is a Senior Lecturer. William is currently an external examiner for City Law School, London, and he was previously an assistant chief examiner at the Bar Standards Board. William creates and delivers CPD for other professionals, including local authorities, barristers and solicitors.


-          1st class LLB (Hons) degree (2005, Swansea University)

  • Top final year law student in Swansea University.
  • Joint recipient of the Sir Samuel Evans Prize (University of Wales, 2005) for the highest law grades across the University of Wales.

-          ‘Outstanding’ Bar Vocational Course (2007, Cardiff University)

  • Lord Williams of Mostyn Achievement Award for the outstanding student in witness handling (Cardiff University, 2007).
  • Angel Chambers Prize for the highest results in Criminal Practice (Cardiff University, 2007).

-          William is currently studying an MA Education (University of Bath).

Professional Membership

  • Wales and Chester Circuit
  • The Honourable Society of Gray’s Inn
  • Family Law Bar Association