Employers must ensure their staff are safe when working at height to help avoid the risk of work injuries, the Health and Safety Executive (HSE) has advised.
It is "vital" that those working at height are prevented from falling by suitable barriers, explained HSE inspector Guy Dale.
The warning follows a work injury suffered by a man who fell from the first floor of a building he was working on.
He was using a power tool at a site in Staffordshire when he fell through the side of the building, suffering life-threatening work injuries.
An investigation found that the walls had been removed and a steel girder was "inadequately positioned".
G Baskerville Ltd pleaded guilty to breaching health and safety regulations and was fined £8,000.
HSE principal inspector Nigel Long has also spoken of the importance of firms doing all they can to prevent work injuries.
"It makes good sense to tackle these risks, which can have serious consequences for workers as well as disrupt business," he commented.