The Following is from the HSE.
The law
6 The Health and Safety (FirstAid) Regulations 1981 require employers to provide suitable firstaid equipment, facilities and personnel to enable first aid to be given to employees if they are injured or become ill at work.1 Regulation 3(2) states that in order to provide first aid to injured or ill employees, ‘…a person shall not be suitable unless he has undergone
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(a) such training and has such qualifications as the Health and Safety Executive may approve for the time being in respect of that case or class of case, and
(b) such additional training, if any, as may be appropriate in the circumstances of that case’.
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7 For employers to comply with this Regulation, their firstaiders must have a valid certificate of competence in FAW or EFAW, issued by a suitable training provider (see paragraphs 89).
Requirements for training organisations wishing to run firstaid courses for the workplace
FAW and FAW requalification
8 To run these courses, your organisation must be approved by HSE.
So where do we stand, because unless they change the law, then traiing proviers must be approved by the HSE and certificates are still only valid for three years. Therefor in order to requalifie then the First Aider must undergo requalification training.