Nicola Williams started her career as a barrister in private practice, specialising in Criminal Law. On leaving private practice she held four senior Ombudsman roles both in the UK and abroad, including as Service Complaints Ombudsman for HM Armed Forces when she was the most senior Black person in UK Defence, and as the Complaints Commissioner for the Cayman Islands. Nicola was a member of the first Independent Advisory Group to the Metropolitan Police Service following the publication of the Stephen Lawrence Report and has been a part-time Crown Court Judge since 2010. She is the author of three legal thrillers. Without Prejudice (1997) was selected for the Black Britain: Writing Back series by Bernardine Evaristo and Until Proven Innocent was the winner of the Diverse Book Awards Readers Choice Award 2024. Her third novel, Killer Instinct, was published in July 2025.