The Solent Sky museum is dedicated to flying boats and other aircraft, and the first plane you see upon entering is the Saunders-Roe SR.A/1. It's rare, and not just because only a few were built. It's one of the few small flying boats (most this size are seaplanes with pontoons). It's also one of the only jet-powered seaplanes/flying boats. Lastly, the first two Marin-Baker ejection seats were fitted on the first two prototypes.
In its military garb this would have held the forward gun turret that would be winched back into the airframe to give a crewman access in case they needed to tie off to a dock or other boat. As you can see, there's also an anchor, if required.
This Sandringham was owned by Charles Blair, Jr. while he was married to Maureen O'Hara. He used it in his Caribbean airline business (though when he owned it, it was called "Southern Cross"). It was built in 1943 as a Sunderland Mark III, converted to a Mark V with Pratt & Witney engines in 1944, and demilitarized and converted to a Sandringham in 1947.
Some front luggage space. This is the main cabin deck; the cockpit is directly above where I'm standing. Behind the hatch is access to the open area with the anchor you saw earlier. To my right are two bathrooms -- with windows!
Lots of room back here. I'm just under six feet, and the ceiling was close enough to make me notice, but not to have to duck. A hatch here (and in the room on the deck above) give access to the baggage hold.
This photo gives you an idea of the cabin layout. Here you can see the first three of four rooms on this deck. Each has eight seats (the rear-most room has seven). With the exception of the second room, there's lots of legroom.