Where were you?

August 21/22nd 1976,
The concert at Knebworth a quarter of a million was purported to be the largest ever venue gathering in uk at the time. No.estimates did vary.
Did not enjoy the day but I suppose that I was there and I did take some photographs.
The sound system was dominated by the stones crew who were very uncooperative with the other bands so the setups came late but best provided by 10 cc controlled by Ian Phillips whom I knew.
Waited and waited but The stones were getting so and partying at the house whilst leaving the audience waiting in the dark and passed midnight - beyond the planning permission.
I left before they finished to get away but locked out of accommodation in Cambridge - disgusted never bought another stones anything.