We used to joke that our student caving club was really very safe, having only had seven fatalities over the 50 years it had been operating.

In reality we had a lot of expertise and took safety very seriously. The club had always done a lot of exploration of new caves and other intrinsically tricky activities, and six of the seven deaths were in the same accident (the Mossdale Caverns tragedy of 1967). Our parties of freshers were in very limited danger being trained in well-known and well-explored caves. But still.