I arrived half an hour early before meeting the cameraman for a film about Cwm Taf Fechan, so popped up on to the limestone of Morlais Castle Hill to look for bryophytes. I hadn't looked at this area before and had high hopes, but time was against me and I didn't get far. Between SO045097 and SO046098 I noted the following more interesting species: Entosthodon obtusus on vertical clay by the footpath with Calypogeia fissa; Fissidens incurvus, Pleuridium subulatum and Tortula modica on anthills; abundantly fruiting Tortella tortuosa; Bryum pallens and Thuidium assimile (photo below) in turf by a flush; and Conocephalum salebrosum on damp limestone.
Barry, my dataset doesn't have any of the 2006 bryo survey data made by Graham and me; have you got it all from SEWBReC or BRC? Things like Riccia beyrichiana, R subbifurca, Seligeria acutifolia, S pusilla etc.