On Start the Week, Andrew Marr explores how Britain trains the artists and designers of the future. Christopher Frayling and Sarah Teasley celebrate the 175th anniversary of the Royal College of Art, the world's oldest art and design school. But one of its former teachers, the industrial designer Ron Arad argues for a broader arts education which doesn't split sculpture from painting, architecture from design. And the artist Antony Gormley redefines the limits of sculpture and building.