There were similar 'roofed over hulls' in the Menai Straits and at Dundee (Dundee one still there ... called the 'Unicorn' if I remember ... but I might be completely wrong about the name even tho I went round it just a couple of years ago 🙂) .... always intrigued me the way those old wooden warships that seem from far history with their muzzle-loading cannon and sails survived into the age of nuclear subs still in use.

K