The first 100 years of Promenade Concerts are brought to a rousing conclusion in the second half of tonight's live concert. Joining in the music-making and festivities are two of Britain's most brilliant young artists, percussionist Evelyn Glennie , soloist in Paul Creston's Marimba Concertino, and Welsh baritone Bryn Terfel. Popular works by Kabalevsky, Massenet and Grainger - all premiered at the Proms - are performed before the evening comes to its traditional grand climax, including - as ever - Henry Wood's own Fantasia on British Sea-Songs.