How can he not be happy with Wonga, yet quite content with Virgin Money?? They're both corporate financial institutions, so if we're going to talk about ethics and principles, there's no difference between the two is there?
Just a few hundred percentage points of interest, probably!
I am pretty sure that interest charging on eg. loans is forbidden by Islam - in which case you're possibly right that disagreeing with one and not the other is a bit inconsistent. But if he was that hardline, he wouldn't be able to ply his trade as a professional footballer in the first place. At any top club anyway, unless they were sponsored by Emirates (actually, that would give him a choice of about half the clubs in the world, it seems) or some other non-financial/gambling institution. Maybe he just draws the line at extremes?