Bulb. claptonense is currently considered a synonym of Bulb. lobbii by the Kew Monocot List. At the same time, the RHS has accepted claptonense as a parent for a number of crosses. There are several species(or not) in the lobbii "complex" that are variously believed valid species or synonyms by various authorities. I'm not aware of any dna testing that has been performed on this group. Don't change your tag.