I’m assuming this is the Serpentine. Read the full story of these Kodachrome slides of my father’s restoration here.
I’m not sure whether this was in the Tower or Windsor, but found it among the Kodachromes left by my father, the resurrection of which is recorded here.
A couple of London street shots from my father’s collection of Kodachromes from 1955-56. You can read the story of their digitization here. I really like the feel of the top image with its cool blues and grays and the backs of only a few people and no cars in the streets. A definite sense of urban desolation.