BBC Breakfast weather presenter Carol Kirkwood was forced to step in on Tuesday morning, after host Dan Walker began mocking Sally Nugent.Dan and Sally were taking up seats on the red sofa to present the news of the day, with the situation in Afghanistan at the top of their agenda.But there was soon a lull in the conversation, as a slightly awkward silence pervaded over the hosts.After a moment, Sally began: "Hello, this is Breakfast-"But Dan cut her off with a fit of giggles, apologising as Sally's head turned sharply towards him. "Sorry!""Are you laughing at me?" Sally asked her red-faced co-host.Dan awkwardly insisted: "No!
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