There is a lovely small exhibition at the National Gallery at the moment, charting the development of outdoor landscape painting by such 19thC artists as Camille Corot, Théodore Rousseau, Simon Denis, Jean-François Millet and so on, up to the works of Claude Monet, and tracing their influence on the Impressionists. All the 90 or so paintings come from the National Gallery's own collection, and the exhibition is free. Most of them are quite small and every one a pleasure to look at. We are lucky that the National Gallery has such a magnificent collection.
Although Corot painted mainly in Italy and France, Monet (as we know) did paint in England. Here is one of his pictures from the exhibition, The Thames Below Westminster: