Here is your answer Bill. We took a rope from the top of the mast, pulled hard and tied it off on the other side of the quay. Simples! (Well Pete did at high tide at 3 o'clock in the morning, love him) The boat now seems to be staying upright and carving herself a nice hole to sit in.
I have discovered that trying to upload photos for the blog using the dongle is a real pain and better to do one at a time. So later I will post pictures of the interior of the boat as promised and a picture of Alfie for Eek.