This week: Alun Hoddinott talks about his orchestral work 'The sun, the great luminary of the universe'; Misha Donat reflects on the Italian elements in Tuesday's Prom; George Benjamin and Teresa Cahill anticipate Friday's performance of Benjamin's 'A Mind of Winter'; and an interview with Giles Swayne, who conducts his 'Missa Tiburtina' on Friday. Presented by Roger Wright Producers RAY ABBOTT and ANDREW KUROWSKI (Re-broadcast tomorrow at 2.0pm VHFIFM)