As an employer (whether you're a company, a partnership or an individual), you're generally legally responsible for making sure your business complies with health and safety law. You can nominate another 'competent person' (either a trained member of staff, or a consultant) to manage this part of your business, but you will still be legally liable for any accidents or damages. We can take directors, managers and supervisors to court, if a health and safety offence has happened, with their 'consent or responsibility'.
You have to consult your employees on health and safety issues, and make sure that all staff know about the regulations and policy in place in your organisation.