A decade ago, Duffy – single name, single album (at that point), multiple Brit Awards, a Grammy, very Welsh – had been to number one on debut with her album Rockferry. She looked at least as likely, if not more so, than fellow single-moniker fresh face, Adele, to become a long-term star, and songs such as Warwick Avenue, Mercy and the title track were on the way to being standards. When she toured Australia in early 2009, the shock of that success, the smack to the head of th