I've got a vintage SLF lapel button and the original UK pressing of their first album "Inflammable Material" on the Rough Trade label. What a great band! Have fun at the show!
Their bass player leaves and Bruce Foxton of The Jam falls into their laps. You don't get much luckier than that, IMO.
I understand the original line-up is back together. They won't be pogoing on the stage now, those guys are as old as I am, too tough on the joints.