It appears the two common Pogonatum species are much scarcer in the lower lying areas of Glamorgan as well as Carmarthenshire. The maps suggest both are absent from the Vale (George's challenge!) and lower land of the Gower peninsula (my challenge). Charles and Hilary have recorded them in a good proportion of the monads they have visited in NPT, so I guess altitude and geology are important factors? Finding P. nanum is of course the real challenge! It's on the county list, but we have no records in MapMate yet.