BBC Breakfast presenter Dan Walker was left furious with his co-host Sally Nugent on Tuesday, as she appeared to brand him "second class" in a tense on-air row.Dan and Sally were hosting the programme from the sofa, with Nina Warhurst chiming in as a correspondent on various affairs of the day, when things turned to the introduction of new postage stamps.The new stamps will include a barcode to track and trace deliveries, and have been introduced from today.Dan, Sally and Nina were all handed a huge stamp of their own to demonstrate the system to viewers, with Dan and Nina both holding second class stamps while Sally's was a first class stamp.And things soon took a turn for the tense, with Sally beginning: "Have you been hiding something behind the sofa?
What have you got?"Dan replied: "I have got something behind the sofa, would you like to see it? It's rather large."The pair proceeded to pull out their huge stamps, with Dan saying: "Look at this little beauty.
It's a new stamp - you might not recognise this thing, though. It's got a barcode."He went on to ask Sally: "Have you got one as well, by the way?"But when Sally pulled her own stamp out, Dan immediately asked: "Hold on.
Why have you got a first class stamp and I've got a second class one? What are they trying to tell me?"Sally hit out at him: "Don't you think it's obvious?" and couldn't help giggling.Turning to Nina, Dan demanded: "Are you responsible for this, Warhurst?
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