He isn't Cher.
By referring to him as "Andrew" after the first mention rather than "Mr Mountbatten-Windsor" or "Mountbatten-Windsor" he is still being treated as something other than an everyday citizen. If a story about, for example, Ricky Gervais was on the news, he would be referred to as "Ricky Gervais", "Mr Gervais" or "Gervais". Not "Ricky".
Is this the same on all channels?