Solo. From the carpark a little south of Storey Arms. After ascending Corn Du and Pen y Fan went down ridge and up to Cribyn. Returned by a path that contours across the southern slopes of Pen y Fan and on a whim went up to the cairn on Craig Gwaun Taf and then back to the highest point which is on a knoll on the edge of the crag. Only found out it is now a Nuttall when I returned home. Continued to Y Gyrn. Mostly good weather but some mist and a little rain.