No5 Barristers' Chambers - Excellence is at the heart of everything we do.
Background

William Theaker

Practice Director, Clinical Negligence & Personal Injury

"'Peter Mottram, William Theaker, Matthew Reeves, Morgan Smith and Tracey Witherford all have been exemplary in finding solutions to problems and responding to calls and emails quickly."

"Will Theaker and Pete Mottram run a very tight ship."

Legal 500 2026

"Clerks are very helpful, and efficient. William Theaker, in particular, is a credit to the chambers"

Legal 500

"Will Theaker in particular is an excellent clerk, and the clerks are always helpful, responsive and polite"

Chambers & Partners 2022

"No5 Barristers’ Chambers is a go-to set for personal injury and clinical negligence in the Midlands. The depth of counsel is exceptional, and they are led by the very best."

Legal 500

"The chambers is reliable and offers a high-level experience and knowledge. It is committed to providing an excellent level of service."

Legal 500

William Theaker is a Practice Director within the Clinical Negligence and Personal Injury Groups at No5 Barristers’ Chambers, one of the largest and most highly regarded sets in the country. Based primarily in London, William oversees the strategic and operational management of the team, including leading silks and juniors practising across all aspects of personal injury, clinical negligence, inquests, and public inquiries.

Having joined No5 over a decade ago, William began his career in the post room before progressing through several clerking roles across multiple practice areas. In 2022, he was appointed Practice Director, his career progression reflects both his commercial acumen and deep understanding of the Bar and its evolving legal market.

William is recognised for his collaborative and client-focused approach, working closely with solicitors, insurers, and institutional clients nationwide. He plays a key role in business development, strategic growth, practice management and the continued expansion of the Clinical Negligence and Personal Injury Groups across London, Birmingham, and Bristol. He is regularly involved in the development of large-scale marketing initiatives, client events, and national directory submissions.

Alongside his role at No5, William sits on the Executive Committee, Management Committee and the EDI, wellbeing and Retention Committee of the Institute of Barristers’ Clerks (IBC), where he serves as Common Law Secretary and contributes to wider discussions surrounding the future of the Bar, clerking, and chambers management. He also sits on the Race Panel for the Bar Council and was recently appointed to the Equality, Diversity and Social Mobility (EDSM) Committee, supporting initiatives focused on inclusion, representation, and progression within the profession.

Known for his approachable manner and commercial mindset, William is committed to maintaining the highest standards of client service while supporting the long-term development and success of members and the clerking team alike.

Achievements and Key Impacts

  • Completion of the ILM Level 5 Diploma in Leadership and Management (2020/2021
  • Completion of Executive 1-1 Coaching with GuruYou (2024)
  • Chaired the Institute of Barristers’ Clerks Annual Conference (London – 2025)

Related News, Resources and Events

Maxwell Cope Joins No5’s Personal Injury & Clinical Negligence Group

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Maxwell Cope Joins No5’s Personal Injury & Clinical Negligence Group

We are delighted to welcome Maxwell Cope to No5 Barristers’ Chambers as he joins the Personal Injury and Clinical Negligence Group from 7 Harrington Street…

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No5 Barristers’ Chambers Announces New Practice Managers for PI/CN Team

We are delighted to share some fantastic news regarding recent promotions across our clerking teams. Following a period of sustained growth and development for the…

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