The open skies of the flatlands of East Anglia have always been creatively stimulating for poet Lavinia Greenlaw. So why have writers of the last three centuries been repeatedly drawn to mountains, specifically the Alps? Ruskin, Shelley, DH Lawrence and WH Auden, among many, have poetically tried to scale the peaks. But don't the Alps get in the way of the view? With contributions from climber/critic Robert Macfarlane , the Swiss poet/rapper Raphael Urweider and the ghosts of Heidi and The Sound of Music. Producer Tim Dee Repeated on Saturday at 11.30pm