Any form of blacklisting is illegal.
With regards to the health and safety of offshore workers, the Government provides health and safety legislation and employment legislation as a framework for employers to operate in.
Employees are entitled by law to refuse to undertake work that is not safe without fear of disciplinary action.
Employers have a duty of care to their employees, requiring them to take all steps reasonably possible to ensure their health, safety and wellbeing.
It is for employers to ensure they are acting within the law and for the regulators and employment tribunal to determine if the employer has broken the law.