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Gregory Treverton-Jones KC

Year of call: 1977

Silk: 2002

“A giant in the field.” Chambers and Partners

Greg Treverton-Jones KC specialises in regulatory and disciplinary issues concerning legal professionals. He is one of the best known barristers in the field has appeared in many of the leading cases, both for the regulators and respondents. Most of his work nowadays is on behalf of those facing regulatory investigations or disciplinary proceedings. He is instructed by numerous firms, individual solicitors and sole practitioners in connection with the most pressing regulatory issues of the day, He has been described in Chambers and Partners as the leading defence advocate in solicitors’ disciplinary cases.

He is regularly instructed by the Crown Prosecution Service (CPS) to advise and appear in costs applications made by acquitted privately-paying defendants in the Crown Court.

He is co-author of successive editions of The Solicitor’s Handbook (2008-2022), co-author of Disciplinary and Regulatory Proceedings (9th edition, 2017, 10th edition, 2019) and has previously been an editor of Cordery on Legal Services. He has an extensive advisory practice, concerning all aspects of legal regulation. He regularly writes articles and is quoted in the legal press.

Greg was named ‘Silk of the Year’ for Professional Discipline at the 2015 Chambers Bar Awards.

Greg is recommended in Chambers and Partners 2020 for Professional Discipline (band 1) and The Legal 500 2020 for Professional Discipline and Regulatory Law (tier 1).

Areas of expertise

Regulatory and Disciplinary

Cases of note:

  • Solicitors Regulation Authority v James, MacGregor and Naylor [2018] EWHC 3058 (Admin) - Approach of the Solicitors Disciplinary Tribunal to sanctioning for dishonesty.
  • Wingate and Evans v Solicitors Regulation Authority [2018] EWCA Civ 366 - Meaning of lack of integrity in disciplinary proceedings. 
  • Yussouf v Solicitors Regulation Authority [2018] EWHC 211 (Admin) - Entitlement to an oral hearing in some circumstances in regulatory proceedings. 
  • Smith v Bar Standards Board [2016] EWHC 3015 (Admin) - Inappropriateness of reliance on hearsay evidence in Bar Disciplinary Tribunal.
  • Solicitors Regulation Authority v Solicitors’ Disciplinary Tribunal and Arslan (Law Society intervening) [2016] EWHC 2862 (Admin) - Standard of proof in certain regulatory proceedings. 

Costs and Litigation Funding

Gregory Treverton-Jones QC regularly assists solicitors in connection with regulatory and costs issues arising out of the Jackson reforms and the introduction of alternative business structures, including advising on and assisting in the drafting of new-style damages-based agreements and Conditional Fee Agreements. He has been instructed in several group litigation matters, advising solicitors and claimants as to their funding arrangements.

He is regularly instructed on behalf of the Crown Prosecution Service to oppose applications for costs against the CPS following Crown Court trials, and has appeared in the following recent Divisional Court cases:


“A renowned advocate who specialises in the representation of solicitors facing significant disciplinary proceedings. He is also noted for his adept representation of barristers and surveyors, as well as their regulators.”
Chambers and Partners 2022

“Considered to be the expert for solicitors discipline and regulation. An excellent advocate.” The Legal 500 2022