An independent review into the Horizon scandal, chaired by was set up in September 2020, chaired by retired [[High Court of Justice|High Court]] judge Sir [[Wyn Williams]]. Following the case of Hamilton & Others v Post Office Limited in 2021 the inquiry was converted into a statutory public inquiry the following year.<ref>{{cite web|url=https://www.bbc.co.uk/news/business-57173296|title=Post Office Horizon scandal inquiry extended after criticism|date=19 May 2021|work=BBC}}</ref> Hamilton's oral evidence was heard on 14 February 2022. She was the second of about 60 subpostmasters to appear before the inquiry. She spoke about the impact of her prosecution on her health, family life and finances and said: "I've almost become obsessed by fighting for justice. And I can't sleep nights. Literally it goes round and around in my head".<ref>{{cite web|url=https://www.theguardian.com/business/2022/feb/14/i-knew-something-was-wrong-first-witness-in-post-office-hearing-breaks-down|title=‘I knew something was wrong’: first witness in Post Office hearing breaks down|date=14 February 2022|work=[[The Guardian]]}}</ref>
