Surely Barry would have been with Carol when Ange handed over Dom though? So she would have met him. Of course most 14 year olds wouldn't be handing their baby over in person to the adoptive parents.......
I think we are getting a bit carried away here.
Perhaps the last year has been a dream, like in Dallas? A mysterious gas was pumped out the air con and everyone went to sleep and dreamt the same series of events and now it has worn off and everyone will wake up and none of the last years extraordinary events actually happened. Now we can carry on with a proper hospital drama that features some patients instead of just the staff and their families.