This was the pinnacle for me as a Zeppelin fan. I was just that bit too young to have seen the guys at previous gigs, but Knebworth came in my 18th year. It was everything a festival should be:- no sleep the night before in the over-crowded campsite; up at some unholy hour to make the pilgrimage in the rain across to the showground; then waking up, in the warmth of the morning sunshine, to hear Nicky Horne starting his set. Am I confusing events, or did Chas & Dave open the live proceedings? I will never forget the food fight that started when a guy would not sit down during Todd Rundgren's set - I got through an entire large packet of Rich Tea biscuits, which made positively the best frisbees imaginable.
It would be trite to try and eulogize, but suffice it to say that this event has stayed with me ever since (and I saw over 100 gigs in all during those heady days).
I am one of the extremely lucky ones who will be at the O2. Oh my God!