Former Tory MP Harvey Proctor has stormed out of a BBC interview over Scotland Yard's botched handling of the fake Westminster paedophile ring.
"I'm not having this, I'm sorry," he said, before removing his earpiece and walking off the set.
The former MP was among several high-profile figures named by Beech when he reported allegations of historic sex abuse following the broadcast of a television documentary on Jimmy Savile in 2012.
Beech, 51, was later jailed for 18 years for making false allegations.
A probe by former High Court judge Sir Richard Henriques said the failed £4.5m Operation Midland probe resulted in search warrants for innocent suspects - including Mr Proctor - being “obtained unlawfully”.
The interview began with Mr Proctor describing how it felt to be caught up in the Metropolitan Police's disastrous investigation into false claims of a VIP Westminster paedophile ring.
He said: "What happened to me was that I lost my job, my home and my repute as a result of a fantasist who were believed by the Metropolitan Police."
Mr Proctor then clashed with Ms Munchetty after he said Metropolitan Police Commissioner Cressida Dick should be brought onto the programme to debate the force's handling of the case.
He said: "I respect your work very much but you must not invite people onto your programme and then not allow them to speak."
Ms Munchetty replied: "I am allowing you to speak and I will allow you to speak but I also need to give a right to reply rather than letting you say things that are potentially incorrect or when people don't have a right to reply.
He retorted: "I'm not having this, I'm sorry."
After he left, Ms Munchetty said: "I think what was made very clear there is the impact that this investigation has had on his life."
The row comes after BBC director general Tony Hall overturned a decision to uphold a complaint against Ms Munchetty after she accused Donald Trump of racism.
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