If I remember correctly, we went up that way, turning off the PW and straight towards Heron rocks. But before we got there we veered off to the left (god alone knows why!) and must have crossed the PW again (!) before ending up on the north side of Bleaklow. We kept seeing a wire fence and thought "that must be relevant to our navigation" for some reason. After what seemed like ages we came to the other side of Bleaklow and saw the rocks towards Mickleden way in the distance. We thought we were out of the woods but it was a nightmare to get to the cairn from there. Ya gotta love it!