There's lots of coverage of fake news in the media at the moment; GBP's Mark was caught up in what can best describe as a 'Kerfuffle'.
He's recently been working for a company called Benchmarking Assessment Group as a psychometric test for their clients to see how they'd react in a disaster scenario.
On the original YouTube posting it says very clearly that it's fictional. It doesn't even look like a genuine BBC News report. It was never meant to.
However, Mark played his role so convincingly that many people were fooled by its authenticity before it was pulled from YouTube.
Here's how the story was covered on the BBC News website.
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