One of our favourite British experimental groups was the Portsmouth Sinfonia, aka ‘the world’s worst orchestra’. This is a short documentary about their performance at the Royal Albert Hall on 28 May 1974, with Sally Binding, pianist on Tchaikovsky’s First Piano Concerto, and the Portsmouth Sinfonia Choir, singing The ‘Hallelujah’ Chorus from Handel’s Messiah. It’s in three parts on YouTube, to be found by clicking the links below. Thanks to the musicologist and theorist Kevin Holm-Hudson for making us aware of this historic film.