That was even before one of the greatest guitarists of any generation takes the stage.
Founder of Guns N Roses, one of the biggest hard-rock bands ever, since the demise of the original line-up he has not rested on his laurels.
He's been playing and recording with his own groups, Slash's Snakepit and Velvet Revolver, as well as putting out a series of solo albums.
As the lights go down the announcer asks the packed house if it's ready to "rock and fucking roll."
The answer is an unequivocal yes, as Slash storms the stage with his band led by former Alter Bridge vocalist Myles Kennedy and Todd Kerns on bass.
Over the course of two hours they don't disappoint.
Mixed in with Guns N Roses classics - Sweet Child of Mine, Night Train, Paradise City and Mr Brownstone - Slash treats the crowd to Revolver classic Slither too.
But he doesn't ignore his solo work, with Anastasia - the highlight of his latest album Apocalyptic Love - already a crowd favourite and that's evidenced by the mass singalong every time the chorus comes around.
And when the obligatory encore starts fans are not left disappointed as Alter Bridge alumni Myles Kennedy and Mark Tremonti, whose new band provided support on the the night, reunite with Slash on stage.
The fans leave for home in the wet south London night on a high.