Well, I know Charlie Winston had come to France because he mixes genders, he likes to mix music & theatre and I think Mika has the same problem. They don't restrein themselves to ONE kind of Art but try to extend their work to other areas... Same for Music, they both mix different types of sounds...
They both said that UK tended more to label everything and when something can't be labelled, well... that's often a problem to get promo there... That's why Charlie has moved to France and he doesn't regret it, I think. :') It's quite funny 'cause his bro*according to what I've heard* is pretty famous out there and a complete stranger here
( I'm not saying Mika should move to France Don't get me wrong~ )