I came upon this photo attached in the book 'Flagship Hood' by Alan Coles and one of the survivors Ted Briggs pub'd by Robert Hale London (page 52). It shows a game of hockey being played next to the aft turrets on the quarterdeck of the Hood. Looks a similar view of her stern to me, only yours is starboard so I'd agree your supposition is spot on. My interest came from the fact that uncle served on the Hood. Cannot help with the port, the ship cruised the globe.