In 1973 Tom Phillips set out the following instruction for a new conceptual work which he called 20 Sites n Years:

Every year on or around the same day (24th May - 2nd June) at the same time of day and from the same position a photograph is taken at each of the twenty locations on this map which is based on a circle of half a mile radius drawn around the place (Site 1: 102 Grove Park SE15) where the project was devised. It is hoped that this process will be carried on into the future and beyond the deviser's death for as long as the possibility of continuing and the will to undertake the task persist.

Fortunately the will to undertake the task has persisted and each year since 1973 Tom Phillips has completed the annual nine mile circuit photographing each of the twenty locations.

Jake Auerbach is a filmmaker who works directly with his artist subjects to make truthful and compelling documentaries which are screened in galleries and museums around the world. Over several years he accompanied Tom Phillips as he photographed and edited 20 Sites and through interview, observation and archive footage he has made a film that tells the story of this work.

You can stream the film, purchase it on DVD or watch the trailer at this link: http://www.jakeauerbachfilms.com/product/20-sites-n-years-stream

A screening and Q&A event with both artist and filmmaker will be held at the Wilson Road Lecture Hall, Camberwell College of Arts, London SE5 on Wednesday 22nd June. Tickets are available through the South London Gallery