It turned out to be a "trompe d'oeil" by the very talented Nina Camplin who had these spectacular images on nearby walls:
It's remarkable how realistic an inaminate piece of art can appear, as Lily found out further along the prom:
In the afternoon we went to Dorchester to have a look at Poundbury. I had been hoping to stock up with cheap batteries and Jiffy Bags as I normally do but it turned out to be a suburb of Trumpton.
And I keep coming across references to one of East angular's leading artists: