Despite having been put together mostly from old tunnels and buildings dating back to the late 19th and early 20th Centuries, the London Underground has had surprisingly few mishaps in what could be considered to be modern times. Compared to the amount of use the system has had over the years, only a few major incidents have ever occurred, most of which have led to immediate changes to improve the safety of the tube. This Entry looks at the more infamous of the incidents that have taken place on the Underground, along with some other notable occurrences.