Someone who has completed First Aid Training appropriate to the level identified in the First Aid Needs Assessment. If formally qualified then they need to ensure that they have a valid certificate and undertake refresher/requalification training when required.

As a guide, the HSE suggests the following number of trained first-aiders being available at all times people are at work:

For low-hazard work (e.g. offices, shops and libraries)

• <25 employees - At least 1 first-aider.
• 25-50 - At least 1 first aider trained in EFAW.

• 50 - At least one first-aider trained in FAW for every 100 employed (or part thereof).

For higher-hazard work (e.g. light engineering and assembly work, food processing, warehousing, extensive work with dangerous machinery or sharp instruments, construction, chemical manufacture).

• <5 employees - At least 1 First Aid Appointed Person(s).
• 25-50 - At least 1 first aider trained in EFAW or FAW depending on the type of injuries that might occur.

• 50 - At least one first-aider trained in FAW for every 50 employed (or part thereof).