The reports are that there are 4 seriously injured. I was on that ride last week confidently assuring the dcs that they would be fine and the park operated to the highest safety standards.
As I understand it, one carriage hit an empty one. This should not be possible and a similar crash many years ago at Alton Towers was held to be operator error. I was thinking that they were all just young kids operating the stuff and I hope they had a lot of training.
Very best wishes to those who were hurt.