My old friend Roger came across this concert advertisement.  We went to this together on November 6th 1967, the year that Traffic first formed.  They broke up in 1969, with Steve Winwood joining Blind Faith for less than a year before reforming Traffic in 1970.  The Who did not smash up their equipment on this occasion, but were brilliant and very loud! I have no real memory of the Herd and Marmalade, but do remember being impressed with how good the Tremeloes sounded, although not particularly a fan at the time.  The Herd had their classic lineup, with Peter Frampton, who left the following year to form Humble Pie with Steve Marriott.  Kennedy Street Enterprises are still around promoting concerts in the UK.