Katie Mustard


Katie prosecutes and defends in the Crown Court and youth courts. In 2018, she was seconded to CPS London where she litigated all cases across the criminal spectrum including sexual offences, gang-related offences and fraud. She is a CPS panel Advocate at Level 2.

Katie also has experience of investigatory work and public inquiry work. She successfully completed an ‘Investigative Interview’ course with Intersol Global in 2017 – this has assisted her with undertaking the early stages of investigation in respect of private prosecutions. She has also appeared in cases prosecuted by charitable organisations, including the RSPCA.

Katie also has a regulatory practice, primarily focusing on health care and education regulation. She frequently receives briefs to appear as a case presenter for the Nursing and Midwifery Council (NMC), including cases of misconduct, lack of competence and health.

Katie is on the CPS Extradition Panel at Level 1. She has represented Issuing Judicial Authorities (IJA) at extradition hearings and requested persons at the High Court.

Background and expertise

Prior to joining chambers, Katie worked within the regulatory department at Kingsley Napley. She undertook work for both regulators and individual registrants.

Katie has completed the vulnerable witness training course through Lincoln’s Inn. She is regularly instructed in matters involving both vulnerable witnesses and vulnerable defendants.

Notable cases

R v CT, 2019

Katie represented a client who was facing firearms and drugs charges. He was charged with an offence under the Firearms Act which carries a mandatory minimum 5 year prison sentence and possession of Class B drugs with intent to supply (PWITS). Consequently, the client was facing an immediate prison sentence of several years. At court the Crown accepted pleas to a lesser offence under the Firearms Act and simple possession of the drugs. Katie was then able to persuade the Judge to impose a total sentence of 7 months imprisonment suspended for 18 months. Isleworth Crown Court.

R v UH, 2019

Katie prosecuted a Newton Hearing in respect of a child abduction matter. The issue in dispute was whether the 13 year old complainant had been threatened during the time he had been abducted. The Judge found that threats had been made and sentenced the defendant to 28 months imprisonment. Snaresbrook Crown Court.

R v MD, 2019

Katie prosecuted a case involving prolific burglary offending. Following numerous court appearances the defendant was sentenced to over 10 years imprisonment. Croydon Crown Court.

NMC v DK, 2019

Katie presented a three week midwifery case where the Registrant faced over 50 misconduct charges including undertaking intimate examinations when they were not clinically indicated. The panel found most of the charges proved and struck the Registrant off the register.

R v JM, 2019

Katie prosecuted a man who was sentenced to three and a half years for committing bank frauds which totalled in excess of £100,000. Reported in the press here.

NMC v RB, 2019

Katie presented a case where the Registrant’s omissions related to a particularly vulnerable patient, who sadly died. Following a 7 day hearing, which involved evidential issues regarding the Coroner’s inquest, the panel found all the charges proved and cautioned the Registrant.

R v FR, 2019

Katie prosecuted an extreme pornography trial where the defendant was accused of possessing a number of videos depicting sexual conduct with animals. Maidstone Crown Court.

R v DON, 2019

Katie prosecuted a man who stole nearly £10,000 from his mother whilst she was unwell and in hospital. He offered a plea on the day of trial and was sentenced to 15 months custody. Woolwich Crown Court.

NMC v JD, 2018

Katie presented a case where the Registrant was accused of clinical misconduct as well as stealing a blue disabled badge permit and using this fraudulently. Following a 7 day hearing the panel found the charges proved and struck the Registrant off the register.

Read more Notable cases

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PROFILE: Katie Mustard

Year called




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Regulatory / Disciplinary

Road Traffic

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Road traffic


020 7489 2727


BPP (2014) - Bar Professional Training Course – Outstanding

Birmingham City University (2012) – LLB Law Hons – First-Class with Honours


The Honourable Society of the Inner Temple


Grade 2 prosecutor

CPS Extradition List (grade 1)

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