Topic
CDM 2015 & Site Duties
Who's responsible for what under the Construction (Design and Management) Regulations 2015.
The Health and Safety File: what it must contain, and who's actually responsible for it
The health and safety file gets assembled during a project most people never think about again — until someone renovating the building years later needs to know exactly what's behind a wall they're about to open up.
29 July 2026 · 5 min readCDM 2015, explained: who's responsible for what on a construction site
The Construction (Design and Management) Regulations 2015 split responsibility across five named duty-holders — and knowing which one you actually are changes what you're legally required to do.
16 July 2026 · 5 min readWhat is an F10 notification, and when do you need one?
Larger or longer-running construction projects have to be notified to the HSE before work starts — and the notification needs to be kept current if the project details change.
24 June 2026 · 4 min readWhat a principal contractor is actually responsible for under CDM 2015
Coordinating health and safety across every contractor on site is the headline duty — but it extends into site rules, welfare facilities, and who's actually allowed on site at all.
27 May 2026 · 5 min readWhat has to be in a construction phase plan
A construction phase plan needs to be a working document the site actually operates from — not a generic template produced once to satisfy a CDM requirement and then filed away.
14 January 2026 · 4 min readWhat a principal designer is actually responsible for under CDM 2015
The principal designer's duties run through the whole pre-construction phase, not just the health and safety file — and on projects without one, the responsibility doesn't disappear, it just moves.