"Taking first the ordinary meaning of the words `kind of work' I do not think they would be generally understood to refer to hours of work. Two people, both engaged on similar clerical work, one of whom worked for only 3 hours in mornings and the other for 7 hours in afternoons and evenings, would be much more likely to say that they did the same kind of work than different kinds of work. They might well say `we do the same kind of work but our hours are different'. Then I find the reference in the paragraph to place of employment helpful in two ways. First, the express reference to the place where a person is employed shows that a change of place is not regarded as constituting a change of kind, for if it were there would be no need to make special reference to it. If `place' is not an element in `kind', it is difficult to see why time should be. Secondly, since attention has been specifically directed to place, one would have expected that if Parliament had intended time to be taken into account, it too would have been expressly mentioned.