"(1) A person discriminates against a woman in any circumstances relevant for the purposes of any provision of this Act if- (a) on the ground of her sex he treats her less favourably than he treats or would treat a man, or (b) he applies to her a requirement or condition which he applied or would apply equally to a man but- (i) which is such that the proportion of women who can comply with it is considerably smaller than the proportion of men who can comply with it, and
"6 In arriving at its decision, the tribunal considered Porcelli -v- Strathclyde Regional Council1984 IRLR 467 in particular they noted the following guidance provided by Lord McDonald:
"... if a form of unfavourable treatment is meted out to a woman to which a man would not be vulnerable, she has been discriminated against within the meaning of s1(1)(a)."