The boat is already laden with people. We're not late, but perhaps this is one of those instances where arriving half an hour early was the correct thing to do. I dash down to the owners, who are standing at the land end of Sandsayre Pier, near Sandwick on Shetland, and tell them my name. Thankfully my booking, made online over a month ago, was recorded and my friend Simon and I are on the list...