In the end I managed to stay on the path right to the top of the summit ridge of Meall na Teanga. Halfway up I saw what looked like two walkers perched at the top of the steep slope a little way off the path to the left. They didn't seemed to be moving, nor were they together but had some distance between them. I wondered why they weren't on the path. Once on the ridge the path all but disappears, but it is an easy walk along the ridge and I had no difficulty finding the summit cairn.

The summit cairn of Meall na Teanga