manufacturing and testing of new support arms for the Jetline trains," the Swedish Accident Investigation Authority said. It said the support arms weren't sufficiently strong. The roller coaster ...

The Jetline rollercoaster reaches a height of 30m (90ft) and a speed of 90km/h (55mph). The park was evacuated after the accident and police and emergency services were called to the scene.

But two major accidents involving the coaster at Lightwater Valley turned out to be a life-altering experience for more than one family. We reveal the world's darkest and greatest disasters all ...