The man who has led fellow former sub postmasters in their campaign to overturn wrongful convictions, Alan Bates, was among those giving evidence to MPs today.
The bosses of the Post Office and Fujitsu also faced the committee for the first time with the Post Office chief executive, Nick Read, admitting that it was possible that money paid by victims of the Horizon IT scandal may have been paid to Post Office executives.
On the Sky News Daily, Niall Paterson looks at what else we learned from the exchanges, as he is joined by journalist Nick Wallis, who wrote the book The Great Post Office Scandal, and Seema Misra, a former post office operator who was cleared of theft from the Post Office after being convicted and jailed in 2010.
Podcast producer: Alex Edden
Senior podcast producer: Annie Joyce
Interviews producer: Melissa Tutesigensi-Charles
Promotion producer: Jada-Kai Meosa John
Editor: Wendy Parker