Just as an aside - I hope you don't mind John, we came home last night in a veritable deluge, roof up but side screens off and were amazed at how dry we were. Admittedly the rains coming straight down but were were moving through it. My left arm of my jacket was slightly damp that's all. I think that you'll be fine.
Thanks for that info Meabh.. good to know.. It's all part of the Morgan driving experience 👍