How often do you watch a broken heart being mended? Not often, maybe never, but it feels like Strictly viewers were observing something miraculously akin to healing over the past 11 weeks. Annabel Croft, the former British Number 1 tennis player, signed up for the BBC’s dance show in the same year that she lost her husband. Mel Coleman, a yachtsman and investment banker, had been diagnosed with cancer and died in May, aged 60.