Picture by Roger Bamber: 11 July 2004: Artistic Director Gavin Henderson, rehearses his 20ft Alp Horn on the South Downs at Devils Dyke, near Brighton, for Orlando Gough's new work 'Thin Air'. The piece with Alp horns, cow bells, yodelers, choir and brass will be performed for its World Premiere at Dartington International Summer School, near Totnes, Devon on the 12 August 2004.