No need to appoint PC or PD if there is only one contractor, unless "3" below applies, i.e. it is a notifiable prohect.

Key changes of the new CDM Regulations 2015—CITB infographic version

http://www.citb.co.uk/do...ographic%20-%20final.pdf

1. All projects must have:
• workers with the right skills, knowledge, training and experience
• contractors providing appropriate supervision, instruction and information
• a written construction phase plan

2. Project where more than one contractor is involved (domestic or non-domestic) must have 1 above plus:
• principal designer and principal contractor must be appointed
• a health and safety file


3. If work is scheduled to:
• last longer than 30 working days and
• have more than 20 workers working simultaneously at any point in the project
• OR exceeds 500 person days
All of 1 and 2 above plus
• Client must notify project to HSE

Agree with achrn on this.

Notification and appointment of duty holders are two different things but it can get confusing...

Mikecarr - achrn has answered your question. BUT if it was a site with multiple contractors, as long as the single person, company etc is competent then as far as I am aware they would be able to hold multiple duties. Certainly for a company, think about a large construction company that may have a "design" department and a "construction management" department. Easy to hold 2 duties in that vein.