Michael Buble's Christmas is poised to break through 1.5 million UK sales imminently as it this week mounts the biggest chart-topping challenge to Olly Murs.

A year after the Reprise/Warner Bros title dominated the festive market, spending a week at No 1 in November and then returning there for a fortnight at the end of the year, it looks like doing it all again having already sold another 55,000 copies this week, according to the Official Charts Company. That is ...