(1) In relation to -
(a) access to employment,
(b) conditions of employment,
(c) training or experience for or in relation to employment,
(d) promotion or re-grading, or
(e) classification of posts,
an employer shall not discriminate against an employee or prospective employee and a provider of agency work shall not discriminate against an agency worker.
(2) For the purposes of this Act, neither an employer nor a provider of agency work shall be taken to discriminate against an agency worker unless (on one of the discriminatory grounds) that agency worker is treated less favourably than another agency worker is, has been or would be treated.
(3) In subsections (4) to (8), references to an employee include references to an agency worker and, in relation to such a worker, references to the employer include references to the provider of agency work.
(4) A person who is an employer shall not, in relation to employees or employment -
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