Dan Walker and Piers Morgan in breakfast TV brouhaha on Twitter
Rival breakfast show hosts Dan Walker and Piers Morgan have become embroiled in a Twitter spat over the popularity of their programmes.
BBC Breakfast anchor Walker, who replaced veteran broadcaster Bill Turnbull as the co-presenter of the programme last year, began the day by asking viewers if they were up.
But when Good Morning Britain co-presenter Morgan, 51, replied that the audience were tuned into his ITV show, things got a little heated.
Walker, 39, wrote on Twitter: " Hello there BBC Breakfast people. We're up, we're on... are you with us?"
Morgan replied: "No mate, they're watching Good Morning Britain."
Walker, who is a devout Christian and has a background in BBC Sport, told him: "No... they really aren't Piers #FakeNews"
Morgan posted a screenshot of Walker with the wrong caption underneath in which he had been incorrectly given the name of fellow broadcaster Charlie Stayt.
"No offence Dan Walker - but do your employers even know who you are?" Morgan asked.
To which Walker responded: "Why don't you concentrate on your own show?" He added: "All the best, Charlie."
Morgan presents Good Morning Britain with Susanna Reid while Walker co-hosts BBC Breakfast on Mondays, Tuesdays and Wednesdays with Louise Minchin.
Wednesday morning's caption mix-up also saw BBC Breakfast presenter Sally Nugent incorrectly called Naga Munchetty.
BBC producers changed Walker's title after realising the error, but continued using the wrong name for Nugent, who was standing in for Minchin.
Walker joked on Twitter: "Almost right."
BBC Breakfast's average daily audience is more than 1.5 million - around three times as many as Good Morning Britain's.