PIERS Morgan has taken a huge swipe at Prince Harry's "privacy campaign" after the duke's High Court grilling.
The royal, 38, yesterday took the stand in court and was cross-examined as part of the phone hacking trial against the Mirror Group papers.
He unleashed a string of bombshell claims about his life in a six-hour grilling, repeatedly saying: "I don't know".
Harry also took multiple jabs at former Mirror editor Piers Morgan.
In a 55-page witness statement, the prince claimed Piers' behaviour was "vile and entirely unjustified".
The TalkTV star was quizzed by Sky News as he left his house yesterday afternoon - when he hit back at Harry.
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When asked what he thought of the duke's accusations, Piers sarcastically said: "I didn't see it but I wish him luck with his privacy campaign - look forward to reading it in his next book."
Harry – who flew in from his home in LA on Sunday to attend the trial on Tuesday – had shared a 55-page bombshell brief.
In it, he made dramatic claims that his relationship with Chelsy Davy had been “doomed” due to press coverage, feared he would be “ousted” from the Royal Family over rumours Major James Hewitt was his dad and that the British government had reached “rock bottom”.
In his submission, of 200 points, he also claimed he was called "the ‘thicko’, the ‘cheat’, the ‘underage drinker’, the '‘irresponsible drug taker'" during his teenage years.
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Harry added: "I thought that… I may as well ‘do the crime’, so to speak."
But as he was quizzed by Mirror group lawyer Andrew Green KC, Prince Harry repeatedly told the High Court "I don't know" - describing his experience on the stand as "stressful".
At one point Prince Harry answered questions on whether reporters could have spoken to a source to get information on flight times during a holiday with then-girlfriend Chelsy - rather than hacking phones.
He replied: "I'm unsure. It could be phone hacking, blagging, of course security, Chelsy and numerous other people would be in the knowledge."
And the duke even tried to turned the questions on the Mirror's lawyer Mr Green.
"I am here to cross-examine you, I am afraid that's the way this works, Prince Harry," Mr Green said when Prince Harry suggested the lawyer direct his questions to others.