Nicola Groves (& Ben Saxton) have finished 6th in the Nacra 17 worlds after a great last two days in which they got two wins, a third and a fourth in the medal race. You should be able to watch video of the medal race here. The Nacras are first up, with the sequence starting about 4 minutes into the video.
Results are still labelled preliminary as of 15/2/2016. The official results people got themselves in a truly horrible mess with the results, which are linked from here, but make more sense now than they did. At one stage they had, uniquely in my experience scored the double points for the medal race by entering the results twice!