London's cultural scene steams into August with an eclectic range of arty goings on. Those of you with art collections to refresh are in luck this week. Contemporary Arts Project's "Start You Collection" are offering a whole load of "highly collectible" art for under £200 from Friday, asking, "Without our art collections, how would we understand our cultural roots and trace its development to the present?" Indeed. And let's face it, if you can't......