If the system was in manual mode, then I feel awful for the person who dispatched that train. However, generally speaking from what i've seen, the engineers at Alton are usually very good, and i'd be amazed if they released a train without checking the track was clear first.
Listening and reading the press and social media this morning is laughable. Hanging upside down is really making me laugh, after it was on the news all afternoon where you could clearly see they were not. People saying they will never visit again, that Alton doesnt take safety seriously, sigh, they all seem to forget that when they step out of their front door in the morning to get in the car (or walk, or cycle) to work they are actually at a higher risk of having an accident than going on a rollercoaster.
As for the leg amputation, I think they may be believable, the press and ambulance sources keep saying "life changing injury". A broken leg or cuts and grazes isnt life changing.