This is the moment a 10-year-old schoolgirl brusquely puts a veteran interviewer in his place with the withering line: "Maybe you weren't educated properly?"

Charlotte, 10, from Wirral in northern England, locked horns with the BBC's Andrew Neil in a debate about Britain's recently announced sugar tax.

Charlotte came to the Daily Politics show armed with statistics, and a ready rejoinder to accusations the sugar tax was a "nanny state" measure.

BBC Andrew Neil: Met his match with 10-year-old Charlotte.

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Asked if the tax was another example of the nanny state, Charlotte, replies: "Mr Neil, do you remember on January 31st 1983 when seat belts were made compulsory?'

BBC The kids are OK with the nanny state, if it saves lives, Neil discovers.

"It wasn't a popular idea. People didn't like it. But do you know how many lives it saved a year?

"Three hundred lives per year because the government did something."

Neil then asks fellow young guest Henrietta what she thought.

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"If it's saving lives and it's helping the NHS, then I think we should be told what to do," says Henrietta.

Andrew responds: "When I was your age and someone told me not to do something, that usually meant I tried to do it."

Then Charlotte strikes: "Well, maybe you weren't educated properly enough about health and wellbeing."

The stunned presenter, a former Sunday Times editor, then jokes: "Many people have said that."