The thing clearly tested yesterday, i don't think that is in dispute.
It appears to be running through that knot a few mph faster than it has been in the past.
Who knows, new trains could already have arrived at some point in the middle of the night on unmarked lorries? Just because nobody has discovered a delivery doesn't mean it didn't happen, they do ALOT in the middle of the night.
Example, was staying at splash with the wife about 3 years back, it was 3 oclock in the morning and we were snooping around for a cash machine that didnt charge for withdrawal, the 2 medical responders had nothing to do so let us jump on their jeep and drove us in through some back gates and right up to the cashpoints on Towers Street.
This was right before scarefest began, and there were people on park at 3am putting the finishing touches on park decorations.
My point being, if they can do that in the middle of the night, they can certainly take delivery of 2, relatively small rollercoaster trains.
Let's see if testing steps up, or whether or not signs pop up overnight.