South West Water were fined £1.8 million after a lone worker drowned when he fell in to a filtration tank.
The man was working alone when he attempted to fix a fault with the tank. He removed a grill on the tank, and had to lean inside to unblock a filter. He fell through the hole, and was found face down in 6.5ft (2m) of water.
Upon sentencing, the judge said: "The dangers of falling into tanks was pointed out to South West Water on a number of occasions, and the fact that something needed to be done. No correct risk assessment for the procedure had been done. This was an accident waiting to happen."