Mari accepted an offer of tenancy in chambers in September 2023, following the successful completion of her pupillage.

Mari is originally from Neath and studied Law at Swansea University achieving a First. During her studies, she competed in various competitions, including the Oxford University Press Moot and the National Medical Moot where she was a semi-finalist. She was also a runner-up in Future Legal Mind, a national essay competition. Mari worked part-time as a legal clerk throughout her studies. Following this, she studied the Bar course at Cardiff University and attained an Outstanding, ranking second in her year. Notably, Mari had the highest mark in cross-examination, and won as a team the Internal Mock Trial competition. 

Mari received financial scholarships due to her academic and advocacy achievements, such as the Neuberger Prize from the Honourable Society of Lincoln's Inn and the Family Law Bar Association scholarship. 

Mari accepts instructions in all of Chambers practice areas.