The organist and pianist Charles Matthews, tenor John Beaumont, Marcus Davidson (organ, piano and tape), BJ Nilsen (electronics) and Philip Jeck (turntables and samplers) celebrate the influence of the organ. Camilleri's 'Sonata Semplice'; JS Bach's 'Komm, heiliger Geist'; Ligeti's 'Harmonies'; Burrell's 'Lauds'; Pärt's 'Pari Intervallo'; and Davidson's 'The Conscious Sky'. (Note: from 6pm there is an installation by Marcus Davidson and Scott McMillan discusses 'Spire' with Mike Harding and Charles Matthews.)