“A number of recent appeals from decisions of the Fair Employment/Industrial tribunals have involved challenges to conclusions reached on preliminary points - see, for instance, Bombadier Aerospace v McConnell and Cunningham v Ballylaw Foods . While I do not suggest that the hearing of a preliminary issue will never be appropriate for determination by a tribunal, I consider that the power to determine a preliminary point should be sparingly exercised. It is, I believe, often difficult to segregate in a wholly compartmentalised way a single issue in this field from other material that may have relevance to the matter to be decided.”