“First-rate” Chambers UK 2018

“First-choice” Legal 500 2017

Crime Junior of the Year – Chambers and Partners Bar Awards 2015

“Supremely gifted” Chambers UK 2014

“Breathtakingly good” Chambers UK 2013

Details of practice

A specialist in serious crime and fraud, both prosecuting and defending; frequently led and often instructed as a leading junior. His practice is predominantly based in London.

In July 2014, the Attorney General appointed Bill as Junior Treasury Counsel at the Central Criminal Court.  In May 2019 he was appointed Senior Treasury Counsel.

Nominated as Crime Junior of the Year at the Chambers and Partners Bar Awards 2010.

In addition to Criminal work, Bill has a substantial Professional Discipline practice and appears regularly before Disciplinary tribunals and in Inquests.


A respected senior junior, Bill is highly sought after in high profile and heavyweight crime, typically for cases of homicide and/or organised crime. As Treasury Counsel, he prosecutes some of the Old Bailey’s most challenging and high profile murder cases, and is very experienced in dealing with complex multi-handed trials. He also has particular experience and expertise in Misconduct in Public Office cases, and is regularly instructed to defend police officers (ie in the recent News International cases).

Professional Discipline

In addition to representing police officers in the criminal courts, Bill has extensive experience of appearing for officers at Misconduct Hearings, in the Metropolitan Police and a wide range of other Police Forces. Bill also regularly represents Police Officers in Inquests and before the Police Appeals Tribunal.

Directory recommendations

“An exemplary advocate, who is hard-working, conscientious and good on client care. He has a keen and ready understanding of the way instructing solicitors operate.” Chambers UK 2020: Crime

“Totally dedicated, incredibly well prepared, and someone whose client care skills are exemplary.” Chambers UK 2018: Crime

“Excellent. Thorough, charming and effective” Chambers UK 2017: Professional Discipline

“A first-choice junior – everyone has complete confidence in him”; “he has flawless advocacy and client care skills” Legal 500 2017

“He is a supreme intellect and a jury-friendly advocate who exudes calm.”  Chambers UK 2016: Crime

“He’s slick and knows what he’s doing, you know you need to be on your mettle when you’re against him.”  Chambers UK 2016: Professional Discipline

‘He has a lovely manner, he is excellent on technical points and he is down to earth. Clients like him and judges like him.’ ‘He’s hardworking and very straightforward and produces precise legal arguments.’ Chambers UK 2015: Crime

‘A man with a high level of intellect, he cross-examines with devastating effect.’ ‘He is charming and goes an extra mile to defend police officers.’ Chambers UK 2015: Professional Discipline

“One of the most highly recommended juniors, he is “supremely gifted as a criminal lawyer. Judges always listen to his submissions attentively.” Chambers UK 2014: Crime

The “breathtakingly good” William Emlyn Jones handles heavyweight crime matters including murders and allegations of serious police misconduct. “Organised, hard-working, light on his feet and very clever,” he is somebody who is tipped to go very far in the future. Chambers UK 2013: Crime

“William Emlyn Jones is an ‘accomplished, level-headed, capable lawyer’ who frequently represents police officers at misconduct hearings and in inquests. He has particular expertise in cases where a death in custody has occurred’”. Chambers UK 2013: Professional Discipline

“an expert on deaths in police custody, William Emlyn Jones is a regular at disciplinary and criminal proceedings where serious misdeeds are alleged”. Chambers UK 2012: Professional Discipline

Education/professional qualifications

LLB (Hons) Soton 1993


Junior Treasury Counsel 2014
Senior Treasury Counsel 2019