The latest research found the rate of complaints was equivalent to an average of one for every 330 employees.

Over half of whistleblowing reports were submitted via the web (52%), and 45% were made over the phone.

Some 56% of cases were HR issues, including bullying and modern slavery, while 19% concerned dishonest behaviour, such as bribery.

Health and safety issues made up 15% of reports, and 10% were general issues such as data protection and regulatory compliance.

Some 60% of whistleblowers had a preference to remain anonymous, while 27% chose to be named.

•   The Finance Professional Show 2024: The Video
•   Housing association fined £140,000 over 'tragic' worker injuries
•   Builder sentenced over illegal asbestos removal

Joanna Lewis, managing director at Safecall, commented: “Even more so than many other sectors, wrongdoing within the construction industry can have disastrous — and even deadly — consequences.

“Beyond financial implications, not blowing the whistle on unsafe work behaviour can jeopardise the health and safety of employees, workers, and beyond.

“This is why clear and visible whistleblowing processes are imperative: they allow employers to flag things which may be too complicated, too tricky, or simply absent in existing legislation.

“Only once workers feel they can report incidents with confidence can the construction industry operate safely, prioritising the health of organisations, workers, and others within the supply chain.”