In the wake of their latest album's success, Sheffield rock luminaries Def Leppard show no sign of tiring.
After more than 30 years churning out hits, the five veterans headed back to frontman Joe Elliott's house to toss around ideas for a few songs - the result was an unexpected 11th studio album, titled Def Leppard.
It contained material the group had perhaps subconsciously cultivated in their seven-year break from writing, including the hit single Let's Go - a call to arms for anticipating Leppard fans.
Back on the tour circuit with Whitesnake and Black Star Riders, Def Leppard set the Hydro stage ablaze on Thursday night, introducing fans to new tracks in amongst their finest hits.
In a backstage interview with STV, guitarists Vivian Campbell and Phil Collen discussed the band's longevity, saying their thirst to write was a reflection of their refusal to become a "nostalgia act".
They also revealed it wouldn't be the last time Glasgow would catch sight of Def Leppard in a live setting.