Last December, more than 13.1 million people tuned in to BBC1 to see Joanne Clifton and her partner Ore Oduba lift the glitterball trophy in the final of the 2016 series of Strictly Come Dancing. For the girl from Grimsby it was a moment of triumph but it was also a stepping stone into her career as a star of musical theatre. Now she is playing Alex, the steel welder-cum-nightclub dancer in Flashdance The Musical, currently on tour across the UK.