A male walker contacted us to say that he had sustained a leg injury in the vicinity of Heron Pike. When we got there we found that he had a head injury well. He was drifting in and out of consciousness and this was cause for concern. A helicopter was requested to assist, but this had to make a 'precautionary emergency landing' when it suffered a suspected mechanical failure. Eventually it picked up the casualty from near Alcock Tarn. Kendal MRT assisted us as well. His companion, who had gone for help, took some finding, but that's another story.