by AvocadoK on Wed Dec 28, 2011 7:15 pm
I agree. Y&Z forms an irreducible group.
It would be different If Y held 51% of B. Y would then control B by himself, so A and B would not be under common control, always assuming Y and Z are not associated with each other. If it is important for Y and Z to be 50:50 in terms of share capital and votes, you could engineer "control" by Y for these purposes by arranging for Y to lend Company B £100, so that Y has more than 50% of assets on a winding up.
AK