Presented by Penny Gore. The BBC National Orchestra of Wales takes to the dance floor, in everything from Lully to Stravinsky. Michael Tippett conducts one of his own most famous works, Grant Llewellyn conducts music by the featured Welsh composer, William Mathias and the orchestra's principal guest conductor Jac van Steen marks his appointment with a blockbuster from Stravinsky. Tippett: Ritual Dances (The Midsummer Marriage) BBC Welsh Symphony Orchestra Michael Tippett (conductor) 2.25pm Lully: Dance Suite (Alceste) BBC National Orchestra of Wales Francois-Xavier Roth (conductor) 2.45pm William Mathias: Anniversary Dances BBC National Orchestra of Wales Grant Llewellyn (conductor) Chopin Mazurkas, Op 30 (selection) Llyr Williams (piano) 3.15pm Stravinsky: The Rite of Spring BBC National Orchestra of Wales Jac van Steen (conductor).