Alun Williams

Alun has particular experience in cases of serious violence, drug supply and fraud. He is a Grade 3 CPS prosecutor, regularly instructed in matters which involve especially complex points of law.

Alun is also highly experienced in the finer technical details of confiscation proceedings brought under the Proceeds of Crime Act (POCA) jurisdiction, having conducted a number of contested hearings and settled many cases on favourable terms.

He also has an expertise in cases where electronic evidence (and the reliability of it) is paramount.

Alun frequently appears in the Court of Appeal. In his first such appearance (R v JB) he was appointed by the Court to represent four out of five Appellants on the basis of his Grounds and skeleton which had been lodged on behalf of just one Appellant.

Cases of Interest

R v MW & Ors (Ongoing): Secured leave to appeal against conviction in a case that turned upon the legality of private funding of the police and then appeared before the Lady Chief Justice, led by Adam Vaitilingam KC, in the substantive hearing of the Appeal.

R v MA (Ongoing): Junior Alone in a prosecution of Attempted Murder.

R v JB (Ongoing): Prosecution of a s.18 assault upon a 7 month old child.

R v L & Ors (Ongoing): Junior Alone, prosecution of OCG drug supply in Swindon (Operation Yuma) and subsequent POCA proceedings.

Alun is uniquely well-placed to provide robust and informed advice and representation in the regulatory sphere, having come to the Bar after a successful first career as HM Inspector for the Health & Safety Executive.

Alun was an Assessment Manager for ‘COMAH Top-Tier’ sites (chemical plants with the potential to cause catastrophic major accidents) and conducted fatal accident and major incident investigations together with the police under the ‘Work-related death protocol’.

A common theme in his work was the investigation of accidents and incidents and the subsequent preparation and conduct of prosecutions. This involved consideration of offences at the nexus of gross negligence manslaughter, corporate manslaughter and regulatory crime; an area in which he then furthered his expertise by undertaking a Master’s Degree in the field of Corporate Manslaughter.

Using the knowledge and skills built up over many years at the forefront of regulatory oversight, Alun has developed a heavyweight practice in regulatory matters and his skill has been recognised by way of appointment to the Specialist Regulatory List for advocates prosecuting Health & Safety and Environmental Law.

Alun is regularly instructed by agencies including the HSE, Environment Agency, Natural England and the Care Services Commission. He is also highly experienced in Trading Standards prosecutions where he both prosecutes and defends.

By virtue of his former profession, Alun has a deep and immediate grasp of Health and Safety legislation. In his previous role with the Health & Safety Executive, Alun’s work ranged from the regional Major Investigation Team, through to the construction and chemical Major Hazard sectors. This provided a broad expertise in a key area of Regulatory Crime, and also in relation to accidents at work and matters of occupational ill-health such as HAVS, MSD, Asbestos and Legionella. He is also well versed in the Construction (Design and Management) Regulations (CDM). As a consequence, Alun approaches cases with a unique perspective and an instinctive understanding of the competing interests of the parties.

Cases of Interest

HSE v CT (Ongoing): Prosecuting company following fatal accident.

TM v SC (Ongoing): Acting for Respondent in an appeal against the issue of an Enforcement Notice.

EA v HBG (Ongoing): Prosecuting in proceedings brought against a company for environmental discharge.

EA/ NE v MM (2025): Prosecution of individual for contamination of a Site of Special Scientific Interest (SSSI).

HSE v JJM (2024): Defended company in proceedings arising from a fatal accident at livestock market (2024)