The guitar-toting lads have reinvented their sound to reflect their love of US dance music.
And EDM heroes The Chainsmokers could be helping them become the real deal.
Guitarist James McVey told me: “Working with The Chainsmokers is the dream.
“I’ve become friends with Alex Pall and I’ve been talking to Steve Aoki as well. There are one or two collaborations on our album!”