There is a gem of a show at the Getty right now, called London is Calling. It's about post-war art in London, focused on six artists: Bacon, Freud, Kossoff, Andrews, Auerbach, and Kitaj.
This is Michael Andrews' "Thames Painting, the Estuary", 1994-5. The wall label reads: "... On a trip to Canvey Island in Essex he made sketches, notes, and photographs of lugworm diggers and men fishing. These figures and a group taken from a photograph of late Victorians standing on the end of a Thames jetty are positioned looking out to sea, giving scale to the painting. Sand and ash are mixed with the oil paint, adding to the strong sense of place."