Where employers share workplaces (whether on a temporary or permanent basis), they need to co-operate with each other to comply with their respective health and safety obligations.
Each employer needs to take all reasonable steps to co-ordinate the measures they adopt to fulfil those obligations. They also need to tell the other employers about any risks their work activities could present to their employees, both on- and off-site.
These requirements apply to self-employed people where they share a workplace with other employers or where they share a workplace with other self-employed people.