High Quality Content by WIKIPEDIA articles! The Windsor Free Festival was a British Free Festival held in Windsor Great Park from 1972 to 1974. Organised by some London commune dwellers, notably Ubi Dwyer and Sid Rawle, it was in many ways the forerunner of the Stonehenge Free Festival, particularly in the brutality of its final suppression by the police, which led to a public outcry about the tactics involved.