Another sub zero, clear skies morning here on the west coast. Emily and Mark are out with me this week on a four day course. Today we traversed the CMD arete onto Ben Nevis. A fine morning with fantastic views turned into a poor visibility afternoon and some snow flurries, that was a bit of a disappointment but still great fun as always along the arete. There was excellent areas of hard snow and neve, mixed in with large areas of windslab. The arete was wonderfully hard and icy with rime. The final slopes from the abseil post was really good hard snow and neve, anyone without crampons today would have had a difficult time! Summit was deserted bar a couple of guys just come up the NE Buttress. Very poor vis on the upper slopes and plateau, even needed a compass bearing to get down the Red Burn.