Eimear Cook lied in her evidence about two meetings she had with Rebekah Brooks, the former editor's defence counsel told the court.
Cook admitted under cross-examination that a meeting at a friend's home had probably taken place in September 2005 - 10 months later than she had initially claimed.
Jonathan Laidlaw QC also questioned Cook's police statement in which she said Brooks had told her about being accused of assaulting her then-husband Ross Kemp.
He told the court: "Mrs Brooks was not the subject of an accusation of assault, or the subject of the police being called until November 2005 ... Not only did it not happen, it could not have happened."
Cook replied: "I did not make it up ... I have no grievance against Mrs Brooks personally."
More top news
Nine months on, Stratford - where the referendum vote was 52:48 - remains as divided as ever over whether leaving the EU is a good idea.
A remarkably mild night with misty low cloud on the hills of Scotland, Wales and north-west England and further rain in places.
There's a wider purpose to Prince Charles' nine-day visit to Romania, Italy, Austria today.