Carroll already has two yards on Skrtel when he assaults Mignolet.
Firstly, I agree with @Matthew , it certainly wasn't assault. Yes there was distance between them at the point of impact, but that was because Skrtel pushed him forwards and then walked backwards. It's basic physics, he is in the air, there is no friction, Carroll has no way of stopping himself colliding with Mignolet after he has been pushed.
I think we have another Liverpool fan.