By chance, John Aldridge at the tiny but excellent Fry Gallery in Saffron Walden - wonderful stuff, as well as all the Ravillious, Keith Vaughan etc there.. the last day before the gallery goes into hibernation for winter so unfortunately this can't function as a recommendation http://www.telegraph.co.uk/culture/art/10339774/Fresh-airing-for-artist-who-loved-the-outdoors.html