Of course it isn't live. They record it several weeks beforehand.
It is awful too. A couple of years ago they even got the year wrong when they announced the countdown to the New Year!!!
Is it just me, or have the TV schedules for Christmas and New Year gone completely to pot in the last decade or so?? When I was a child growing up in the 70's and 80's I seem to remember Christmas and New Year as being a real "festival" of television. Great films, great shows, great acts (remembering Morecambe & Wise amongst others). For much of that time we only had three channels too, until Channel 4 came onstream. These days little of it inspires me apart from Doctor Who and Call the Midwife.