Almost by stealth, Sundays during the Proms have become the occasion for something a bit different, for double- or even triple-decker events, each with a theme all its own. Hence this Sunday's Multiple Pianos Day, two concerts entirely given over to works involving two or more pianos with and without orchestra. If the afternoon's concert, given by the Britten Sinfonia with half a dozen piano soloists, offers the popular option, including works such as Fauré's Dolly Suite and Saint-Saëns's Carnival Of The Animals as well as a specially commissioned piece by Anna Meredith, the evening one, with the London Sinfonietta under Edward Gardner, is a wonderfully planned all-20th-century programme. George Antheil's rarely played Ballet Mécanique, and Stravinsky's Les Noces, both involving four pianos, frame that concert, and in between there are performances of Bartók's Sonata For Two Pianos And Percussion, and John Adams's Grand Pianola Music, one of the most extraordinary and outrageous of his 1980s scores.
• Royal Albert Hall, SW7, Sun
