Press Association reporter Ellen Branagh says that Vicky Pryce has left court "without saying anything."
She posed for photographers but did not say anything.
Vicky Pryce showed little emotion as the judge discharged the jury, reportedly sitting with her chin in her hand.
Mr Justice Sweeney told the jury in the Vicky Pryce trial:
I have received your note which indicates that it is 'highly unlikely' that you are going to reach even a majority verdict.
I am grateful for that.
Against the background of the length of time that you have been in retirement already, I have decided therefore, and it is my decision one way or the other, that I must discharge you from any further deliberations.
That means that your role in this case is now over.
The jury in the trial of disgraced MP Chris Huhne's ex-wife has been discharged after failing to reach a verdict in her trial for perverting the course of justice by taking his speeding points over ten years ago.
Vicky Pryce, 60, of Clapham, south London, denied the charge, claiming Huhne coerced her into taking the points.
The jury of eight women and four men was discharged at Southwark Crown Court in London after telling trial judge Mr Justice Sweeney it was "highly unlikely" that even a majority verdict would be reached.
The jury in the trial of Chris Huhne's ex-wife Vicky Pryce at Southwark Crown Court has been discharged after failing to reach a verdict on a charge of perverting the course of justice by taking speeding points for him.