The Court of Appeal held in Grundy v British Airways PLC [2007] EWCA Civ 1020 that the tribunal did not err in focussing on the disadvantaged group when deciding if a difference in pay had a disparate adverse impact on women and so must be justified by the employer. In reaching its decision, the Court of Appeal held that there is no principle of law which requires a tribunal to select a pool of the advantaged group when making decisions of this kind. The appropriate pool must be one which suitably tests the particular discrimination complained of, but there may not be a single suitable pool in every case.