Eleven people injured as inverted coaster derails at M&D's in Scotland

From all the "after" photos posted on social media, you can see pretty much all of the coaster tracks and it looks like the track wasn't damaged/broken at all. I feel like the most likely explanation is that the whole wheel assembly on one of the cars broke off at the axel (based on the shocking whole broken wheel assembly!) from the force of that first turn, causing that first car to "peel" off the rest of the remaining train. If the metal was so fatigued on that first train, it wouldn't be unlikely for the metal on the rest of the axels to be fatigued as well. Something routine inspections surely should have caught right??Train must have hit the support after coming off the track, and the collission with the support beam could have even been life-saving by flipping the train over or slowing it down. So crazy how the injuries weren't more severe! The Scottish are strong