David Griffith reports a singing Nightingale in an oak tree between Rhydwilym Baptist Chapel and the Burial Garden on 24th June, which looks to be about this location:
https://goo.gl/maps/ykEMW4oZp973qeoa9
David’s neighbours also report a singing Nightingale near to the river here for 2 nights some 5 days earlier. A very significant record for Pembrokeshire, got to be worth a look/listen.