Ah, nice to see some comments: I was wondering if anyone was bothering to follow this thread. Looks like I'll have to carry on finding time to post photos!
Don't worry, Malcolm. I suspect you'll be in the water long before I am. As well as being pretty slow anyway, there is a constant stream of distractions and other essential tasks that take me off the job.
Tim, you are quite right. Planking the bow is going to be entertaining and I suspect I may need to do it with 2 layers of 6mm rather than one of 12mm. I was talking to a friend about it recently, who is also building in plywood, and he reckoned the same. But he's also anticipating a similar issue with this boat. We agreed that epoxy is a Good Thing!