He 100% wasn't the chosen act last night - I think ideally they'd have had the sword man and the dancing couple. Wayne was thrown out second on, singing the cursed talent show song "That's Life". If they wanted him through, they could have easily swapped Wayne and the other singing lady in the running order to do him a few more favours.
The problem is, Wayne is extremely likable, he does a good job of what he does and his genre of music always does well on BGT. I was expecting him top three, but didn't expect him to win.