Apparently they have according to this article ....(this was before Mr Neil's comments I think )..
Marketing director of Langguth, Armin Wagner, commented: "The Blue Nun brand has strong consumer awareness in the UK and is fast gaining a reputation for producing a range of popular easy, quality drinking wines. In fact, Blue Nun's sales are now higher in the UK than they have ever been. We felt it was important to continue raising the bar by extending Blue Nun's wine range to include a premium offering which will challenge consumers who are beginning their wine journey.