A: West Ridge, PD. Ascended by Michael Fordham, Matthew Graham, Joe Hobbs and Tom Wright, 10th August 2012.
From the top of the scree slope at 4000m head north-west along a scree ridge. After ascending for 100m the ridge becomes more of a scramble, culminating in an exposed summit block. From this scramble down to gain the west ridge of Peak 4155 and follow the crest of the snow; in one or two places it may be necessary to cross patches of névé. The route now becomes a climb with sections of II, over the top of the obvious pinnacle from where the route moves easily to the summit. A continuation east along the ridge may be possible.