I think the first one I saw was ... Nazareth?
Or Motörhead?
Or maybe Girlschool.
I'm not sure.
I saw Judas Priest at the Apollo in Hammersmith.
For gods sake, don't tell Daddy. I'm pretty sure he never knew what we used to do at weekends. School allowance spent on rock concerts and Woodpecker cider, lol. God, I'm surprised we weren't sick all the time. Oh, no, hang ... I think we were, most of the time.