Network Rail fined 3 million pounds for safety failings over the 2002 Potters Bar train crash

Seven people died and more than 70 were injured in 2002, when a high-speed
train derailed at a faulty set of points just outside the station in
Hertfordshire.

The West Anglia Great Northern express train was travelling from London to
King's Lynn in Norfolk at nearly 100 miles an hour when it came off the tracks.