A detailed investigation into the Adamuz train crash in Spain, examining what happened, what investigators believe caused the derailment, and the warnings about track defects raised before the tragedy.
I explore the human stories behind the disaster, including the loss of 41 lives and the death of a 27-year-old train driver, and how families and communities were affected.
Finally, we look at rail safety in Spain, public confidence in high-speed trains, and the questions this tragedy raises for travellers and authorities alike.