Under The Health and Safety at Work Act 1974 “It shall be the duty of every employer to ensure, so far as is reasonably practicable, the health, safety and welfare at work of all his (and her) employees.”
Not only are all employers liable for the health and safety of their employees, but they must also protect any members of the public accessing, using or in contact with their business and premises.
In addition to this legislation, the Electricity at Work Regulations 1989 are made under The Health and Safety at Work Act 1974 and relate specifically to the electrical systems in the workplace.
Regulation 3 from The Electricity at Work Regulations 1989 identifies specifically those who are duty bound by the regulations:
(1) Except where otherwise expressly provided in these Regulations, it shall be the duty of every–
(a) employer and self-employed person to comply with the provisions of these Regulations in so far as they relate to matters which are within his control; and
(b) manager of a mine or quarry (within in either case the meaning of section 180 of the Mines and Quarries Act 1954) to ensure that all requirements or prohibitions imposed by or under these Regulations are complied with in so far as they relate to the mine or quarry or part of a quarry of which he is the manager and to matters which are within his control.
(2) It shall be the duty of every employee while at work–
(a) to co-operate with his employer so far as is necessary to enable any duty placed on that employer by the provisions of these Regulations to be complied with; and
(b) to comply with the provisions of these Regulations in so far as they relate to matters which are within his control.