For the last few weeks, evidence has been heard around the response to the scandal, whistleblowing and access to justice for victims.
Hundreds of sub-postmasters, including Seema Misra from West Byfleet and high-profile campaigner Alan Bates, were wrongly convicted of fraud, because of faulty IT software.
Business secretary between 2010 and 2015 Sir Vince Cable claims he didn’t know it was happening.