Contractor. The main duty of a contractor is to plan and manage the work under their control so that it is carried out in a way that controls risks to health and safety.
Other duties entail co-ordinating their activities with others involved in the project team – in particular, complying with directions given to them by the principal designer or principal contractor.
See: https://www.citb.co.uk/documents/cdm%20regs/2015/cdm-2015-contractors-printer-friendly.pdf
