M&D Tsunami, 2016
In June 2016, five gondolas on the M&D Tsunami rollercoaster at a theme park in Lanarkshire detached from their rails at a bend, causing the rollercoaster to derail and crash. The day before, it had been closed due to a minor electrical fault, but it was fully operational on the day of the crash.
Source: Imgur
A total of ten people were taken to the hospital. Two young boys had critical, life-threatening injuries, and there were six others with serious injuries and two with minor injuries. After the accident, Tsunami was shut down.