It was not contested by the Appellant that aqueous soluble bifunctional reactive dyes containing an halotriazine reactive group as well as a reactive group Y, which may be either -SO2CH=CH2 or -SO2CH2CH2Z, in which Z is a group splittable by an alkali, were known in the art and that relatively concentrated aqueous solutions of such dyes were known from document (1) to be storage-stable at high as