Can an employer defend an equal value claim on the basis that it has carried out a job evaluation scheme?

Yes. Although there is no obligation to carry out a job evaluation scheme, where an analytical job evaluation scheme has been carried out that has given the claimant's job a lower value than that of their comparator, an employment tribunal is required to find that the claimant's work is not of equal value to the comparator's unless it reasonably suspects that the study is discriminatory on the grounds of sex or otherwise unreliable.