So out from Prewley with a cold east wind blowing hard. Dry underfoot with icy patches to dodge. Round the glaciated cwm and up to Shelstone. On and up Corn Ridge to find the aircraft crash site. Lots of molten aluminium around at this sad place. Heading down to the points we meet other walkers sheltering from the wind. They had just enjoyed one of those rather expensive new magic real coffee drinks and it certainly smelt very nice. After a cuppa in the lee, over to Sourton to explore the odd wall like feature - just what is it? Then skippy down to the cars and to the F&H.