Herbie's previous owners didn't like all that pushing and pulling so they got rid of the sliding hatch and made a bespoke hinged hatch cover instead. Here it is closed
now half open (to let a bit of air in, or to peep inside and see if the kettle has boiled))
and fully open
You can also lift it right off.
It works fine and is completely secure and watertight when shut but we're not all that fond of it. Somehow it doesn't look very boaty. I suppose the one advantage is that when opened it doesn't take up any space on the roof like a slider does. On the other hand it blocks the steerers view when propped open.
I've never seen another one like it.