Neil Henderson’s work has encompassed multiple projector pieces, experiments with the materiality of film and photography, and films about landscape. His work has been shown at Whitechapel Gallery, Tate Britain, Kettle’s Yard, Cambridge; Anthology Film Archives, New York and Modern Art Oxford. He talks to Whitstable Biennale 2014 performance curator Emma Leach about Tidal Island, his work for the festival.