From the Supershow 
documentary, which was directed by John Crome and dubbed “The Last Great Jam of the ’60s!” It was reportedly filmed in a disused factory in Staines, England over two days in March, 1969. Bruce had just left Cream at the time, while Miles, a founding member of Electric Flag, was appearing on their debut album A Long Time Comin’ and went on to play with Hendrix in Band of Gypsys.