Live from the Royal Albert Hall, Roger Norrington - who recently turned 70 - conducts the National Youth Orchestra of Great Britain in its annual visit to the Proms.
This year's Prom has a Bohemian theme; they play three popular tone poems from Czech composer Smetana's patriotic work, Ma Vlast (My Country), followed by Mahler's Symphony No 1. During the interval, presenter Stephanie Hughes talks to Roger Norrington and members of the orchestra.
(Also broadcast on BBC Radio 3 and streamed live at [web address removed])
(BBCi: during the programme, digital viewers can access extra information about the music, composers and performers by pressing the red button on their handset)