Post Office scandal: Who knew what and when?

Getty ImagesFormer Post Office boss Paula Vennells' appearance at the inquiry was greatly anticipatedAfter months of evidence, the Post Office Inquiry heard from its final witnesses this week.Closing statements will follow next month before inquiry chair Sir Wyn Williams publishes his final report next year.Much of the evidence centred around who knew what and when, so what did we learn from the key players? And…