Are you familiar with Charlie Simpson/Fightstar? He was in Busted. They were a British boy band of sorts.
I'm not as familiar with McFly, but I'm pretty sure they were the same sort of deal.
the two bands are really intertwined. McFly's founder auditioned for Busted but lost in favor of Charlie, James Bourne (in the photo, the guy with the shorts) writes songs for/with McFly etc.