Suzi Quatro has a confession. At 75, age has taken its toll, she tells the Glasgow crowd. She has lost an inch in height and is now 5ft 1in. “But,” she grins, “I can still scream just as loud.” Proof comes during 48 Crash. It is a thrilling noise, the Suzi Q scream, a holler of swallow-the-world desire and a defining sound of the glam era. She has been screaming like that since she was a kid playing dance halls around Detroit.