Employers have been warned that they face injury compensation claims and fined if they fail to keep plant equipment properly maintained.
The warning from the Health and Safety Executive (HSE) follows the death of a telescopic forklift truck driver who was crushed to death between the arm and the side of his vehicle in Trafford, Manchester.
HSE inspector Warren Pennington described the incident as "entirely avoidable" and said the man’s employer had neglected their duties.
He commented: "MB Plastics Ltd did not have a system in place for formal regular inspections of the plant.
"As a result, the company failed to maintain the cab window which could have saved this mans life."
MB Plastics and site contractor Birse were fined a total of GBP 200,000.
Recent HSE figures show that avoidable accidents claimed 20 lives in London alone during the past year and the body has urged all employers to implement and follow rigid safety procedures.