As an employer, you must ensure, as far as is reasonably possible, the health, safety and welfare of your workforce.
Your workforce must also take reasonable care of their own and their fellow employees' health and safety. They must cooperate with you to help you fulfil your legal duties.
What law applies?
These regulations apply to all types of work.
However, if some of your employees work somewhere that you don't control, you have no duty under these regulations. However, you should still (as part of your general legal duties) take any steps necessary to ensure these employees have access to sanitary conveniences and washing facilities. It may be necessary to arrange for them to use facilities already provided on the site, or to provide temporary facilities.
The law requires that:
Some employees who are self-employed, e.g. for tax purposes, are classed as employed under health and safety law.
It's also important to have a clear policy in place to deal with people other than employees, including members of the public. This applies to any person visiting the workplace who has less knowledge of potential hazards.
The Health and Safety Executive (HSE) charges businesses that are found guilty of breaching health and safety laws. This scheme is called the 'Fee for Intervention'. The costs are based on the amount of time the HSE inspector spent identifying the breach, helping to put it right and taking enforcement action.
Seeon the HSE website for more information.