National Jazz and Blues Festival, Windsor Racecourse 1966, moved from Richmond and run by Harold Pendleton of The Marquee. Had another one in 1967, but Eton Rural District Council had a lot of local complaints and the bands had to turn the music down, which didn't please some of them, or us, for that matter. Not much jazz about it though .... subsequently moved to Sunbury (just up the road), then Plumpton racecourse, finally, to what became Reading. Pretty much the same time, IOW (3), Stonehenge and The Windsor Free. Brilliant. Not much folky stuff, if that's the thread .... Sorry !!