I went to the Charlton gig a couple of weeks earlier. Rained all day, image below from the actual gig, I was 14 and travelled down from Liverpool on the day. Only time I saw The Who with Keith Moon, 15 times without over the years.
I was standing over to the right out of shot. Can still remember the lazer beams.
First gig was in 1973 at the Liverpool Empire, Roxy Music supported by a young Leo Sayer dressed as a clown. Christ he was loud.