Andy,
re the tinnies, agree the ballast tank idea for tinnies - in winter to stop them icing up! In summer it gets a bit warm so a cooler is necessary. I take your point re the English "summer" might need to throw in my thermals!
Anyway back to business, have booked in at Penryn for 29th June through 3rd July to have a good look around Falmouth and other parts of Cornwall after visiting the Jurassic Coast. We are flexible re a day on the water. SWMBO (she who must be obeyed) is not keen on the open sea so perhaps Day B or C (1st or 2nd July I think) might be best but that is up to you and space on your BC23.
I am not sure if I ever obtained your e-mail address when we were talking about your Watercraft magazine collection, any chance you could send it to me along with your mobile number for contact when we get to UK. My e-mail is rockdoctor46atbigpond.com.
On the subject of excess baggage, the magazines might have been a minor charge compared to one of my later jobs in Central African Republic when Air France hit me big time for my boxes of iron ore samples.
Regards