Lord Sugar said in a statement that Stella English's claim was "a derisory attempt to smear [his] name" and her reputation "is now in tatters".
I am pleased that the tribunal has returned this verdict and feel vindicated in the judgment that myself, my companies, the BBC, the TV production company and my staff acted properly throughout Ms. English's employment.
There was never a case for us to answer but her need for money and fame meant that the whole system was subjected to this charade.
I have been cleared of a derisory attempt to smear my name and extract money from me.
– Lord Sugar
The allegations were without substance, and I believe this case was brought with one intention in mind - the presumption that I would not attend the tribunal, that I would not testify and that I would settle out-of-court, sending Ms. English on her way with a tidy settlement.
I'm afraid she underestimated me and her reputation is now in tatters. I have principles and I am not going to be forced to compromise them, no matter how much time and money they might cost me.
The Tribunal case brought by Stella English against me and my company has been dismissed. A victory for the law against the claim culture.
A judiciary paper said Stella English's had been dismissed:
The judges also ruled that the claim "should never have been brought."
Former winner of The Apprentice Stella English has lost her claim of constructive dismissal against businessman Lord Sugar, the Judicial Office said.
Lord Sugar has accused one of his Apprentice winners of lying and taking him to a tribunal "to extract money". Stella English won the TV show in 2010, but is suing the businessman for constructive dismissal.
ITV News UK Reporter Sejal Karia is at the East London Employment Tribunal.
Lord Sugar condemned a "claim culture" today as he accused a winner of his TV show The Apprentice of lying and taking him to a tribunal to get money.
He said Stella English's constructive dismissal claim "together with its publication in the media, is simply an attempt to extract money from me."
Lord Sugar also said Ms English wrongly believed he was "scared" of articles about him or The Apprentice appearing in the press.
"I seriously believe the claimant is deluded that I'm frightened about newspaper articles and that I would not appear at a tribunal as a witness."
He said Ms English was under the impression he would pay her off to avoid having to attend the hearing.
But he told the tribunal: "I have no intention to pay her any money unless told to do so by the law."
At times Lord Sugar was irate as he spoke at the constructive dismissal hearing, at one point saying he wished he has employed another contestant "instead of her" pointing at Stella English.
In response to Ms English's accusation that referring to her, he said: "Nice girl, don't do much", Lord Sugar said:
"Absolute garbage, total garbage...why would I make a statement like that which is tantamount to an insult."
He also dismissed other claims by the 34-year-old as "total nonsense, lies, blunt lies".
Lord Sugar has dismissed a former winner of the BBC's The Apprentice's claim that she been an "overpaid lackey" at his IT division Viglen and later pressurised to take another role.
Appearing at a tribunal where she is suing him for constructive dismissal, the entrepreneur said Stella English's allegation was "total garbage".
He added that her claim that she was ostracised by colleagues at Viglen was "a figment of her imagination".
The entrepreneur also said Ms English's claim that he told her he "didn't give a s***" was another example of her being "deluded".