hi Ian, there are a number of cleaning courses, it depends on what specific area of domestic cleaning you are doing. If you are cleaning ovens for example, this is generaly a specialist area and you would have to provide training particularly when using harmfull chemicals. If you are simply cleaning general areas, you still have a duty of care to you staff, your customer and members of the public who may be affected by your activities. then you have to ensure you provide an adequate level of training ,safe use of electrical equipment, chemical training, high level cleaning(no standing on chairs) and a up to date H&S policy.