Hi Onora, well I went with my brother today, inevitably there were lots of schools there in fact there were lots of everything except naval craft.
I had already seen the large exhibits, V 1 ,aircraft, maybe not the Harrier.
I saw only one warship a splendid Dreadnought. There was almost no reference to naval warfare! So the guns at the entrance are a considerable proportion of the naval content. The naval war must haved moved else where!
So no HMS Sheffield and no pictures I am afraid.
I suspect the model of MHS Sheffield you sent is in the reserve collection, which I think is housed at Chatham.
As a visit for me it was a 7 out of 10, OK but only just, my previous 2 visits to major London museums has not impressed me so I have to presume it is me.
On the other hand there were a lot off visitors The 1914 centenary must have kindled a lot of interest.
I looked in at the refreshments a bit 'National Trust '. So when I left I turned right found the first pub and had an excellent fish and chip lunch.
Here endeth my 1000th. post.
regards Roy